KD-Science (from reviewers)
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| type of soil that contains a mixture of sand, silt, clay and humus | loam
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| Englishman who introduced the scientific method | Bacon
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| a muscle that forces air into and out of the lungs | diaphragm
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| a structure that has infinite form and performs a certain function for a body is a _______ | tissue
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| the part of a flower from which fruits are formed | ovary
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| the layer of the atmosphere closest to the earth's surface | troposphere
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| evaporation of water from plant leaves is called _______. | transpiration
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| the tiny vessels that supply cells with oxygen and nutrients | capillaries
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| all of the water found in the ocean, land, and atmosphere is known as ______. | hydrosphere
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| organisms that provide the initial source of food in a food chain | producers
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| one thing that makes it almost impossible for men to live in Arctic regions is the____ | coldness
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| ___ rocks form when molten materials inside the earth hardens | igneous
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| large pits from which blocks of rock are mined are called ____ | quarries
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| this part of the body helps keep our balance | semicircular canals
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| it is a piece of land that is level and usually higher than the surrounding land | plateau
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| bean-shaped organ that remove liquid wastes from the blood | kidneys
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| the process by which rocks are broken down into soil | weathering
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| the most common mineral in the earth's crust | quartz
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| ___ occurs when a sperm joins an egg cell | fertilization
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| a seedling is a plant that is able to survive without its ____ | cotyledons
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| these are tubes that carry urine from the kidneys to the bladder | spleens
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| the best type of soil for growing plants is ___ | loam
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| a group of organs that function together to do a specific job for the body | organ system
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| it is the largest internal organ of the body | liver
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| the products of photosynthesis are water, oxygen, and _____ | glucose
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| animals that eat meat are called ______ | carnivores
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| a ___ is a safety device to prevent fires when an electrical circuit becomes overheated | fuse
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| a relationship in which two organisms benefit from each other | symbiosis
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| ___ and sulfur dioxide are the two compounds responsible for the formation of acid rain | nitrogen oxide
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| wind, water and temperature changes cause rocks to break apart in a process called | physical weathering
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| the blending of an animal's color into its surrounding is called _____ | protective coloration
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| the color of visible light with the shortest wavelength is ___ | violet
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| the color of visible light with the longest wavelength is ___ | red
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| the electromagnetic waves that may produce skin cancer are___ | ultraviolet rays
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| the tendency of a motionless object to remain at rest and the tendency of a moving object to continue moving | inertia
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| many animals of the seashore do not move around but they have plenty to eat because the ____ bring their food to them | tides
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| when electrons pass from one wire to another at the bare spots, by-passing a planned path and heating the wires, we say there is a _____ | short circuit
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| light enters the eye through a hole called the _____ | pupil
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| the pupil is surrounded by a colored substance called the ____ | iris
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| this is a device for measuring wind speed | anemometer
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| the imaginary line running through the center of the earth from pole to pole is called ____ | axis
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| the area that has the widest yearly temperature variations is the ____ | taiga
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| the sweat glands are found in the ____ | skin
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| the _____ carry blood away from the heart | arteries
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| the ___ stores bile produced by the liver | gallbladder
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| if air is _______, it is holding 100% of the moisture it can hold | saturated
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| an organized way of soling a problem | scientific method
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| the longest day of the year is known as ___ | summer solstice
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| rapidly rotating winds that blow around a small area of intense low pressure are called ____ | tornadoes
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| the scientist who discovered that heavy and light bodies of the same substance fall at the same speed | Newton
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| animals which are active by night are said to be ___ | nocturnal
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| ____ have flattened bodies with 2 pairs of legs per segment | millipedes
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| these are marine animals covered with spines | echinoderms
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| perpetually frozen ground below the surface is called ___ | permafrost
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| a large quantity of air sharing the same characteristics is an ____ | air mass
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| the type of front that moves the fastest is the ____ | cold front
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| the part of the eye which prevents light from entering the eye is the ___ | eyelid
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| the basic cause of all weather is the ___ | sun
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| ___ is really the weight of all the air about us | air pressure
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| differences in air pressure cause the air to ____ | move
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| air pressure, wind, heat and precipitation are things that make up the ___ | atmosphere
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| clouds formed from the vertical lifting of warm air are ____ | cumulus
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| the changing of liquid molecules to vapor is known as ___ | evaporation
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| What is the law which states that volume and temperature are directly related? | Charles Law
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| the largest family of flowering plants in the ____ family | composite
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| the pH number for a neutral substance is ____ | seven
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| a person who studies soil | pedologist
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| Boyle's law and Charles's law explain the behavior of ____ | gases
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| insects that feed on decaying matter are called ____ | scavengers
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| since electricity is able to do work, scientists classify it as one form of ____ | energy
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| the earth rotates from ____ to ____ | west east
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| _____ is water vapor frozen at ground level | frost
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| the layer of solid unbroken rock in the earth's crust is ____ | bedrock
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| the leaves of the cactus plants are called ___ | spine
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| lenses which make objects look larger are ___ in the middle | thicker
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| a device for stopping and starting the flow of electricity is a ____ | switch
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| ____ is the inflammation of the mucous membrane of the trachea and the bronchial tubes | bronchitis
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| the sweet liquid that attracts insects to flowers is ___ | nectar
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| these are structures which give form to the body and protect vital organs | bones
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| the _____ is used to indicate acidity and alkalinity | pH scale
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| the number of complete waves that pass a given point in a unit of time is referred to as | frequency
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| _____ is the measure of the gravitational force on an object | weight
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| the atmospheric conditions at a certain time and place are called | weather
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| the energy of position is called ____ energy | potential
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| the leaflike structures that surround the petals of a flower are called | sepals
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| the _____ connect bones to bones | ligaments
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| what name is given to one-celled organisms lacking an organized nucleus? | prokaryotes
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| at high temperatures the wire in a fuse will | melt
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| Who discovered that planets travel in elliptical paths? | Kepler
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| these are invertibrates which have tentacles, stinging cells and bodies like hollow cylinder with a single opening | coelenterates
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| it is a kind of relationship wherein one species is benefited while the other is neither benefited nor harmed | commensalism
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| a tubular sucking organ of the lepidopteran is called ____ | proboscis
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| the region near the equator that has practically no wind is the ___ | doldrums
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| the purpose of the eyespots on a luna moth's wings is to ____ | protect
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| organisms that obtain nourishment from dead organisms are _____ | saprophytes
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| organelles in plant cells that enables them to carry on photosynthesis | chloroplasts
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| the principle which explains why airplanes can fly was discovered by | Bernoulli
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| an infection may spread from the throat to the middle ear through the ____ | Eustachian tube
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| scientists divide the distance between the boiling and freezing points into equal divisions. these divisions are called | degrees
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| the number of protons an atom contains is indicated by its ___ | atomic number
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| the largest order of insects is the order | coleoptera
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| a sachet of coffee granules and a tablespoon of sugar were mixed with a cup of hot water, then stirred. the resulting mixture can be classified as ____ | solution
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| a sachet of coffee granules and a tablespoon of sugar were mixed with a cup of hot water, then stirred. the solvent used is ______ | hot water
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| a ____ can occur when the moon is between the earth and the sun | solar eclipse
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| in which organ system are eyes and ears most closely associated? | nervous system
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| the ___ tissue is the animal tissue that has a function of protection and support | epithelial
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| the ___ tissue is the animal tissue that has a function of binding and support | connective
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| the ___ tissue is the animal tissue that has a function of conduction and message sending | nervous
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| _____ is the study of fishes | ichthyology
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| _____ is the study of birds | ornithology
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| one way ofeffectively killing a tree is to cut a ring of bark around the trunk of the tree. this method essentially affects the function of what tissue? | phloem
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| ____ is the amount of matter in a given space | density
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| _____ is the change of velocity over a given time | acceleration
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| _____ discovered the radioactivity of Uranium | Madame Marie Curie
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| a weather instrument used to measure the relative humidity, using the cooling effect of evaporation | psychrometer
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| ____ is a symbiotic association of fungi and roots of plants | mycorrhiza
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| how many significant figures are there in 1.00100? | 6
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| _____ is the study of animals | zoology
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| ___ is the specific study of insects | entomology
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| the Greek mathematician and astronomer who is known as the first person to accurately measure the size and circumference of the earth | Erastosthenes
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| the formation of a new crust on the ocean is called | sea-floor spreading
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| the ozone layer is known to filter harmful radiations such as UV and gamma rays from entering the earth and causing damage to life forms. In what region of the atmosphere is it mostly located? | stratosphere
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| the largest organ in the human body is the ___ | skin
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| the skin belongs to the ____ system | integumentary
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| the hammer, anvil and stirrup are the three smallest bones in the human body and they are found in the _____ | ear
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| if the chromosome number of your skin is 46, the number of chromosome in your gametes is ___ | 23
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| it is during this period of the Mesozoic era when dinosaurs first evolved | Triassic
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| a certain vine plant is symbiotically associated with a certain tree. the vine gets nutrients by piercing through the vascular tissues of the tree. this is a clear example of_______ | parasitism
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| plants and animals must take in nitrogen to make proteins, animals get it from the food they eat, while plants get nitrogen from the ____ | soil
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| which type of blood vessel generally carry oxygenated blood away from the heart to the different parts of the body? | artery
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| what is the amount of work needed to push a 50 Newton box to a distance of 300 cm? | 150Joules
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| the most abundant gas in the earth's atmosphere is _____ | nitrogen
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| the most abundant element in the earth's crust is ____ | silicon
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| dry ice is solid carbon dioxide and is very cold. when removed from a storage container, the dry ice transforms directly into a gas without melting. this is an example of ____ | sublimation
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| if an atom has 4 protons, 5 neutrons and 3 electrons, what is the charge of the atom? | positive 1
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| the process which changes food to a simple, soluble form is called _____ | digestion
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| substances which cause chemical changes in foods are called _____ | enzymes
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| an important substance which carries on digestion in the small intestine is ___ | pancreatic juice
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| the secretion given off by the liver which helps in the digestion of fats is ____ | bile
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| the liquid portion of the blood is the ___ | plasma
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| all body functions of an individual are coordinated by the ____ | nervous system
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| what is the smallest living thing which can cause disease in humans? | bacterium
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| the food-making process in green plants is called ____ | photosynthesis
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| a metallic substance capable of attracting iron and certain other materials | magnet
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| metal cans, such as those used to pack foods can be attracted by magnet because the can is made chiefly of ___ | tin
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| magnetic lines of force can be demonstrated with a magnet and ____ | iron filings
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| a dry cell is safe to use in an experiment because it has a low voltage. the metallic case of a dry cell is made of ____ | zinc
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| if the removal of one lamp from a string of christmas tree lights will cause the rest of the lamps to go out, the lamps are connected in ____ circuits | series
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| all of the planets move in elliptical orbit in the same direction around the Sun, and they lie in almost the same plane except ____ | pluto
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| the earth travels around the Sun once a year. the earth spins on its axis once each ____ | day
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| the force that an object exerts on a given unit of area is called _____ | pressure
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| an element that is naturally radioactive is _______ | radium
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| when sugar dissolved in water, the water is called the ______ | solvent
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| a jackscrew is a combination of an inclined plane and a ______ | screw
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| the movement of one object over another is slowed down by ____ | friction
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| in order to work, some machines use the energy contained in ____ | fuel
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| the energy contained in fuel is an example of _____energy | chemical
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| oil is put on the bearing of wheels to reduce ____ | friction
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| when coal is burned, stored energy is being released in the form of _____energy | thermal
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| alum is used in the process of water purification called ____ | coagulation
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| ______ is often used in water purification to kill some harmful bacteria | chlorine
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| the process of ___ is used to produce water that is chemically pure | distillation
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| solids mixed in water can be removed by ____ | filtering
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| one way to determine whether water has minerals dissolved in it is to boil the water to see if there is a ____ | residue
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| water that has just been boiled will taste flat because ____ has escaped from the water | dissolved air
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| the sense organs found at the side of the papillae are known as ____ | taste buds
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| clear water still contains bacteria and other organism. a chemical should be added to sterilize it. the chemical most commonly used is ___ | chlorine
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| ____ is the source of all water in the world | sea
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| which part of the tongue is sending most messages to the brain when you taste vinegar? | side
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| the process whereby organic matter is broken down and goes back to the soil is called ____ | decay
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| in which part of the flower is pollen produced? | anther
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| _____ is the male reproductive part of the flower | stamen
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| fertilization in the flower results in the production of ___ | seed
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| when bulbs are connected in ____ circuit, the current in all parts of the circuit is the same | series
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| the appliances used in the house should be connected in _____ circuit with the main supply | parallel
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| if you are going to connect two light bulbs in one battery, which circuit arrangement would be more practical to use? | parallel
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| the gas that plays an important role in the process of burning is ___ | oxygen
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| the strongest intermolecular force of attraction exists in ___ | solid
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| producers refer to the green plants that make food. fungi and bacteria which feed on dead plants and animals are known as _____ | decomposers
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| consumers can be classified as primary, secondary and tertiary according to the type of food they eat. primary consumers feed directly on green plants. they are also known as ____ | herbivores
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| any animal that feeds on bird, rabbit, mouse or any other secondary consumer is called ____ | tertiary consumer
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| the most abundant element on the earth's crust is ____ | oxygen
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| metals are hard, shiny solids, with the exception of the only liquid metal which is ___ | mercury
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| the hardest substance known is a non-metal. it is made up of carbon. it is ____ | diamond
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| when acid is mixed with a base, salt is produced. this process is called _____ | neutralization
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| the chemical name of common salt is ____ | sodium chloride
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| sodium hydroxide is an example of a/an ____ | base
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| animals with backbones are called ____ | vertebrates
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| the backbone is not a single bone. instead it is made up of several bones called ______ | vertebrae
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| inside the backbone, the bundle of nerves which connects the brain to other parts of the body is known as ____ | spinal cord
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| a magnifying lens contains ____lens which tend to make the objects appear larger | convex
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| a lens that is thinner in its center than at its edges and spreads light apart is called ___ lens | concave
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| bacteria can be classified according to shape. bacteria that are sphere-shaped or globular are called ____ | cocci
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| some microorganisms can cause diseases. these are known as ____ | pathogens
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| in a transverse wave, the distance from one wave crest to another is known as ____ | crest
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| waves that have the longest wavelengths and are used to carry telephone calls, mobile phone transmission and picture signal over long distances are ___ | radiowaves
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| the highest point of the wave is known as ___ | crest
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| _____ waves are transverse waves that carry energy in a way related to electricity and magnetism, examples of which are radiowaves, ultraviolet waves and gamma rays | electromagnetic
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| during germination, the seed enters a state of being very dry. they can remain alive but inactive for a long period of time. this stage is known as ____ | dormancy
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| the first part of the embryo to emerge from the seed is called ___ | radicle
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| the structure that covers and protects the seed from injury is called ____ | seed coat
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| the seed tissue which stores food for the embryo is ____ | cotyledon
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| the tube that runs from the mouth to the anus is called the _______ | alimentary canal
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| the series of wave-like muscular movements which moves the food down the alimentary canal is known as ____ | peristalsis
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| this is a liquid inside the stomach that contains dilute hydrochloric acid and enzymes which aid in digestion | pancreatic juice
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| the process of breaking down food into smaller molecules that can be absorbed by the body is called ___ | digestion
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| enzymes are special proteins that hasten chemical reaction; they speed up chemical reactions without themselves getting directly involved. the enzyme found in saliva is ____ | amylase
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| if you leave iced water for several minutes, you will see droplets of water form outside the glass. this process is called ____ | condensation
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| what type of eclipse occurs when the moon passes between the sun and the earth? | solar eclipse
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| a ___ eclipse occurs when the moon passes into the Earth's shadow | lunar
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| the most abundant gas in the atmosphere which makes up 78% of it is ____ | nitrogen
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| energy is transferred from the sun to the earth by ___ | radiation
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| the ____ is a layer in the atmosphere which has a beneficial effect of absorbing harmful ultraviolet rays | stratosphere
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| particles or waves given off by atoms undergoing nuclear decay produce ____ | radiation
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| similar organisms which are able to produce offspring that can also reproduce are grouped under _____ | species
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| animals that are able to keep a constant body temperature are warm-blooded or ____ | endothermic
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| invertebrates with six legs and three body parts are _____ | insects
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| the remains or traces of an organism that was once alive is a _____ | fossil
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| water is a combination of hydrogen and oxygen atoms. it is considered as _____ | compound
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| two or more substances mixed together but not joined chemically form a/an _____ | mixture
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| the anvil, hammer and ____ make up the bones of the ears | stirrup
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| light travels with a speed of _______ km/s | 300,000
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| layers of pollutants in the air caused by exhaust gases from automobiles which reacts in sunlight is called _____ | smog
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| wastes that can be broken down by the action of bacteria is _____ | biodegradable
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| ____ is a part of the topsoil formed by the decay of once living organisms | humus
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| the force that keeps the earth in orbit around the sun is ____ | gravity
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| what happens to the oxygen released during photosynthesis? | it is returned to the atmosphere
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| how does the skin protect the body from bacteria? | the skin prevents bacteria from entering the body
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| what happens when a skydiver jumps off from a plane? | he falls with increasing speed
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| Earthquakes frequently occur in Japan because______ | Japan is within the Pacific Belt of Fire
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| Atoms of 6C12 and 6C14 has a difference of two _____ | neutrons
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| choloroflourocarbon (CFC) is one of the substance known to cause _________ in the stratosphere thus causing global warming | ozone depletion
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| the symbiotic relationship between dog and fleas is called _____ | parasitism
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| this is considered to be the largest gland located at the upper part of the body and at the right abdominal cavity | liver
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| the _____ of vertebrates function to excrete unwanted chemicals, including salt | kidneys
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| the spreading out of colors when light shines through a prism is called ___ | dispersion
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| which of the heart's chambers receive oxygenated blood from the lungs? | left atrium
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| an object which is white ______ all light | reflects
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| the amount of energy in living systems _____ as one goes higher in the energy pyramid | decreases
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| a sea water plant was exposed to increasing light intensities, after some time, formation of bubbles was observed, this means that the plant undergoes _____ | respiration
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| sound waves can only travel through a medium. it travels fastest in ______ | solid
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| the bending of light is called ______ | refraction
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| if you place a moth ball in your dresser, it will get smaller after some time. this is because it'll undergo the process of ____ | sublimation
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| in what medium will the speed of light be the fastest? | vacuum
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| dstance is measured by multiplying the speed and the ____ | time
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| a falling stone hits the ground. what happens to its kinetic energy? | it is converted to potential energy
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| the main product of combustion is ____ | carbon dioxide
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| the instrument used to measure atmospheric pressure is ______ | barometer
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| the process whereby acid and base are combined is called _____ | neutralization
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| air is a mixture, solution or compound? | solution
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| the state of matter that exists only at very high temperature and consists of electrically charged particles is _______ | plasma
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| the condition which occurs when the atmospheric pressure is equal to the vapor pressure | boiling
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| the measure of the average kinetic energy of the particles in matter is ____ | temperature
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| as heat is added to a material, the kinetic energy of its particles increases thus volume increases and the material ____ | expands
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| a substance that does not allow heat and electricity to pass through is called ______ | insulator
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| a magnet that holds its magnetic properties over a period of years is callled a _______. it is made up of either iron, cobalt or nickle | permanent magnet
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| the radioactive element that is used for measuring the age of very old rocks | carbon-14
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| the main cause of tides is____ | the pull of the moon and the sun on the earth
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| the river deposit at the mouth of a river in a lake or ocean is called ____ | delta
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| in the water cycle, at which point is water most pure? | in rain
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| the sun heats the sea and some of the water becomes vapor. The vapor collects as clouds. When these are blown over high ground they release water as rain in the process known as ______ | precipitation
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| th four main kinds of taste are____ | sweet, sour, salty and bitter
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| in freezing, liquid changes to solid. what happens in condensation? | gas changes to liquid
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| if your hand touches a hot object, you will pull it away immediately. This action is known as ____ | reflex action
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| majority of bacteria are harmless and some are even beneficial to man. The bacterium commonly known to help is proper food digestion is _____ | lactobacillus
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| ________ is a fatal disease caused by a bacteria known as vibrio cholerae | cholera
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| why does copper sink in water while oak wood floats? | an object with higher density than water sinks while an objects with lower density than water floats
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| why is it easier to float in the sea than in a lake? | sea water is denser than fresh water
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| why does ice float in water? | ice has lower density than water
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| there are two types of solar eclipse. It is __________ when the face of the sun appears to be completely covered or eclipse by the moon. | total eclipse
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| the four most important gases in the atmosphere are _____ | oxygen, carbon dioxide, nitrogen and argon
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| a small, hot planet will most likely have ____ | no atmosphere
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| a ______ is a symbiotic association of fungi and algae | lichen
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| carbon monoxide exuded by vehicles is dangerous when inhaled in great amount because _____ | it competes with oxygen for binding with red blood cells
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| refining metal ore using heat is an example of _____ change | chemical
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| a seed planted upside down so that its root end is facing up & its shoot end is facing down, but after germination the root grows downward & the shoot grows upward. this is an example of what process? | phototropism and geotropism
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| the correct sequence of biological organization from lowest to highest | molecules > cell > organ > population > community
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| density is the amount of matter in a given space. which has greater density, a lake full of water or a cupful of lake water? | both have the same density
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| in a _____ relationship, the two organisms live closely to each other | symbiotic
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| objects seem to be heavier on earth than the moon because _____ | earth has stronger gravitational pull than the moon
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
karlo
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