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Stack #8409
| Question | Answer |
|---|---|
| What is a solvent? | The substance in which the solute deissolves to form a solution |
| What is a solute? | The substance that dissolves yo form a solution |
| What is a solution? | a uniform mixture made of two or more substances |
| What is an acid? | A liquid with a pH level of under seven |
| What is a base? | Aliquid with a pH level over seven |
| What is corrosion? | The wearing away of materials by a chemical reation |
| What is dilute? | Descibes a mixture that has very little solute per bolime of solution |
| What is Distillation? | The seperation process in which the desired component is evaportated from the solution and collected |
| What is Concentration? | A ratio representing the amount of solute present in a solution |
| What is Acid Rain? | Any precipitaion that has a pH lower than 5.6 |
| What is Brownian motion? | the jiggling motion of paricles |
| Whats a Pure Substance? | Any substance made of only one type of particle |
| What is Temperature? | The average kinetic energy of all particles in an bject |
| What is Kinetic energy? | A form of energy associated with motion |
| Whats the Particle Theory Of Matter? | The explanation of the nature of matter that considers atoms to be like tiny particles and that decribes their nature and behavior |
| Who is Robert Brown? | The first person to notice that particles jiggle faster as they are heated |
| What Is Conduction? | A method of heat transfer that requires contact |
| What is Convection? | A method of heat transfer that involves currents |
| What is Radiation? | A method of heat transfer that involves electromagnetic waves |
| What is a Fixed Pulley? | A pulley that does not move and does not change the effor required |
| What is a Movable Pulley? | A pulley that moves with the load and reduces the effort required |
| What is Efficiency? | A comparison of the work that machine does with the energy it uses to do that work, usally given as a percentage |
| What is Thermal Energy? | See heat |
| What is R-Value? | A measure of how well insulation slows heat transfer higher values mean less heat transfer |
| WHat is Sea Breze? | The cool wind that blows from a cool ocean or lake toward the warmer land |
| What is Land Breeze? | A mild wind that flows from the cool land out to the warmer sea |
| What is a newton-metre? | The work done when one newton of force is used for a distance of 1 m |
| WHat is a Specific Heat Capacity? | The measure of a substance's ability to absorb or lose heat given in joules |
| What is a force multiplier? | any simple machine that exerts a large force on the load but requiers only a small effort |
| What is an kilowatt hour? | The amount of electricity used when 1000 W of power is used for 1 h |
| What is a distance multiplier | any simple machine that moves a load through a large distance but requires only a short effort distance |
| What is a Mitochondrion? | the organelle within cells that uses oxygen and changes digested food into energy; the "powerhouse" of the cell |
| What is a Microscope? | a magnifying device that allows the observation of objects and structures too small to view with the naked eye |
| What is a Nucleus? | the organelle found in both plant and animal cells that serves as the "brain" or control centre; contains the DNA, directs overall functioning, and controls the manufacture of materials within the cell |
| what is the GreenHouse effect | the phronomenon caused by an insulting layer of carbon dioxide around earth that lets radiation in but keeps heat from escaping |
| What is an Organelle? | any part of a cell that carries out a specific function or role |
| what is a Organism? | any living thing that carries out all of the seven activities necessary to survive |
| what is an Organ? | two or more tissues combined and working together to perform a specialized role |
| What is Endoplasmic Reticulum? | ER; the organelle within cells that transports materials around and out of the cell |
| What is a Electron Microscope? | a magnifying device that uses a beam of electrons to create an image more than 600 000 times original size; includes both transmission and scanning electron microscopes |
| What is Chloroplast? | The organelle within plant cells that contains chlorophyll pigment; gives plants their colour and provides a large surface area for the collection of sunlight for photosynthesis |
| What is a Compound Microscope? | a magnifying device that combines the magnifying power of both an objective lens and an eyepiece lens; passes light through the object and into the lens to deliver the image right side up. |
| What is Cytoplasm | the jelly-like organelle within plant cells that holds other organelles in place around the nucleus |
| What is a Dissecting Scope? | a magnifying device similar to a compound microschope but that has an eyepiece for each eye and illuminates the surface of an object rather than passing light through it |
| What is the particle theory of matter? | the explanation of the nature of matter that considers atoms to be like tiny particles and that describes their nature and behaviour. |
| What is a Concentrated Product? | they have alot of solute per volume |
| Who invented Dynamite? | Alfred Nobel, A swedish scientist. |
| What does (HHPS) stand for? | Hazardous Household Product Symbols |
| what are periods? | the rows on a periodic table |
| what are groups? | the columns in a periodic table |
| what is ceomposition reaction? | the process of breaking apart compounds into simpler peices |
| what is the purpose of a chemical formula? | to represent the compounds these elements form. |
| who first defined acis and bases? | Svante Arrhenius |
| what is life processes? | the seven activities carried out by cells and organ systems |
| what is global warming? | the trend toward increased average temperatures caused by excess carbon dioxide in Earth's atomosphere |
| what does non-biodegradable mean? | any material that cannot be broken down by organisms in the enviroment or that is broken down very slowly |
| what are non-metals? | elements which are poor conductors of heat and electricity |
| what is a metalloid? | elements that share some properties with metals and some with non-metals |
| what is the nitrogen cycle? | the re-use of cycling of nitrogen in nature through food chains, decomposition, and fixing/ producing bacteria |
| what is a simple machine? | any tool or machine that involves only one movement |
| what is work? | what is done when a force moves an object (w = f x d) the result of force x distance |
| what is a diet? | the amount and type of food you eat |
| what is a fad diet? | any short-lived idea or "craze" about how or what people should eat -- often involving weight loss |
| what is a fat? | a class of nutrient that is stored in the body for use as an energy source when carbohydrates are in short supply |
| what is an enzyme? | physics the ability to do work biology the source of the ability to move, do work, or cause change |
| what is diabetes? | an illness that disables the body's ability to regulate the production of sugar |
| what is a heartburn? | a burning sensation caused by stomach acids rising into the esophagus |
| what is a heart attack? | a severe reduction in the flow of blood to the heart, causeing pain as the heart tissue begins to die |
| what is high blood pressure? | the illness in which a person has blood pressure that is routinely higher than normal |
| what is malnutrition? | a condition of ill-health caused by a diet that is missing essential nutrients |
| whats a mixed diet? | a diet that contains a wide variety of foods |
| what is an X-Ray? | a form of electromagnetic radiation that can be used to "See Through" soft tissue like skin and muscles to make a picture of dense substances such as a bone |
| what are ulcers? | holes or breaks in the lining of the esophagus or stomach caused when a normal degestive juices destroy the protectived mucous lining |
| what is a vegetrian? | a class of diet that limits or eliminates the comsumption of animal products |
| what is the small intestine? | the part of the digestive system that neutralizes stomach acid, absorbs 80-90 percent of nutrients, and releases chemicals that digest food |
| what is a sphygmomanometer? | the inflatable cuff and pressure meter used to measure blood pressure |
| what is an artificial heart? | a mechanical pump implanted in place of a diseased or damaged heart |
| what is a anus? | the part of the digestive system that discharges the solid mass of undigested food called feces |
| what is the esophagus? | the part of the digestive system that pushes food to the stomach using wave-like muscle contractions |
| what are minerals? | nutrients that help carry out life functions |
| what is the food chain? | a model that shows how energy and matter can pass from one organism to another in an ecosystem |
| what is mechanical digestion? | the part of the digestive process in which the teeth and stomach muscles break food into smaller pieces |
| what is a vein? | a blood vessel that takes oxygen-poor blood from body tissues back to the heart |
| what is the stomach? | the part of the digestive system that uses muscle contractions to mix food; releases acids that activate digestive chemicals |
| what is saliva? | the luquids in the mouth that contain enzymes that begin chemical digestion |
| what is reprofuctive rate? | the rate at which a pair of organisms can reproduce |
| what is protein? | a class of nutrients that is used to build body tissue, regulate chemical activity, and supply energy when carbohydrates and fats are not available |
| whats a system? | any group of organs working together to perfom a specialized role |
| what does homeostasis mean? | the tendency or ability of body systems to stay in balance |
| what is the large intestine? | the part of the digestive system that absorbs vitamins, minerals, and water |
| what is nutrition? | a brance of science that studies foods and how the boy uses them |
| what is a parasite? | any organism that lives on or in another organism at the expense of that organism |
| what is a host? | any organism that has a parasite |
| what is hibernation? | a period of significatly reduced metabolic activity to avoid harsh winter conditions |
| what is the golgi body? | the specialized part of the endoplasmic reticulum that packages and transports food and waste until the cell is ready to get rid of it |
| what is gallstones? | crystallized cholesterol that forms in the gall bladder -- an organ in the digestive system |
| what does the heart do? | a hollow muscle that pumps blood through the body |
| what is insulin? | a hormone that regulates the production of glucose |
| what is bulimia? | a mental illness in which a person is so afraid of gaining weight that they force themselves to vomit in order to get rid of food before digesting it--usually resulting in malnutrition and other medical complications including tooth decay and death |
| what is the canada's food guide? | a guideline developed by health and welfare canada to help canadians make healthy eating and lifestyle choices |
| what is a parasitism? | the relationship between host and parasite |
| what is topor? | state of inactivity or dormancy during which body processes slow due to extremely hot or dry conditions |
| what is topsoil? | the top layer of a soil |
| what is a tertiary consumer? | an animal that eats secondary consumers; an animal that eats animals that eat other animals |
| what is starch? | the carbohydrate form in which plants store excess glucose produced during photosynthesis |
| What is an Enzyme? | A chemical that breaks down food during the digestive processes |
| What is Water Cycle? | Fresh-Water enviroments and supplies the vast quantities of water necessary for life on land. |
| What is Nitrogen Cycle? | the re-use or cycling chains, decomposition, and fixing/producing bacteria |
| what is Compost? | A mixture of decomposing plants and soil |
| What is a Carbon and Oxygen Cycles | the re-use or cycling of carbon and oxugen in nature through photosynthesis, cellular respiration, and decomposition |
| What is a Cycle? | the tr-use of matter in ecological systems |
| What is Clay? | the smallest particles that make up soil; form a flexible mass when wet |
| What is Ecosystem? | The sum of a community of living things and the enviroment in which they live |
| What is a food chain? | A model that shows how eneergy and matter pass from one organism to another in an ecosystem |
| What is a producer? | a class of organisms that can make their own food -- usually through photosynthesis |
| What is a consumer? | an organism that eats either a producer or another consumer |
| Whats a decomposer? | a living thing that breaks down dead plants and animals returning their chemical elements to the enviroment |
| What is a food web? | a network of connected food chains that provides a complete model of how energy and matter are transferred from one organism to another in an ecosystem |
| What is a primary consumer? | an animal that eats plants or producers |
| What is a secondary consumer? | an animal that eats primary consumers; an animal that eats animals that eats plants |
| What is a tertiary consumer? | an animal that eats secondary consumers; an animal that eats animals that eat other animals |
| what is a ecological pyramid? | a model showing the relative numbers of organisms or amount of energy available at eat level in a food chain |
| what is a pyramid of energy? | a model showing the total amount of chemical energy that flows through each feeding level in a food chain |
| What is population? | any group of individuals of the same species living together in the same place at the same time |
| what is individuals? | one member of a population |
| what is birth rate? | the number of young produced by a population over a period of time |
| what is death rate? | the number of individuals that died during a specified time |
| what is emigration? | departures from a population |
| what is imigration? | arrivals into a population |
| what is a limiting factors? | the factors that limit the number of individuals that an enviroment can support |
| what is a abiotic limiting factors? | the non-living factors such as weather and altitude that limit the number of individuals that an ecosystem can support |
| what are biotic limiting factors? | the living parts of an ecosystem that affect the size of population the ecosystem can support |
| what are parasites? | any organisms that lives on or in another organism at the expense of that organism |
| What is a parasitism? | the relationship between host and parasite |
| what is a hosts? | any organism that has a parasite |
| what is a predator? | any animal that catches kills, and eats other animals? |
| what is a prey? | any animal is eaten by other animals |
| what is predetation? | the killing and eating of one animal by another |
| what is competition? | the competition aomng organisms for resources such as food, shelter, light, and water |
| what is reproductive rate? | the rate at which a pair of organisms can reproduce |
| What Are Exotic Species? | Any species that does not occur narurally in an ecosystem |
| What is Biological Control? | Any organism used to limit a population of unwanted plants or animals |
| What is Biotic Community? | All the living components of an ecosystem |
| Abiotic Community? | The non-living factors such as weather and altitude that limit the number of individuals that an ecosystem can support |
| What is Terrestrial Ecosystem? | Any ecosystem on land |
| What is Topography? | The physical features in an area |
| What is slit? | tiny rock particles found in soil; these particles are larger than clay particles but smaller than sand |
| What is Clay? | The smallest particles that make up soil; form a flexible mass when wet |
| What is Sand? | Grain-sized pieces of rock found in soil |
| What is Gravel? | The largest particle found in soil; small stones |
| What is Humus? | The part of soil consisting of broken down plant fibres, soil particles, and decayed organisms |
| What is Leaching? | The washing out of materials by water running through the soil |
| What is Horizon? | The horizontal layers in soil |
| What is Topsoil? | The top layer of soil |
| What is biome? | A large geographic area containing distinct plants and animals |
| What is Boreal Forest? | The biome consisting of mixed forests of aspen, spruce, and pine trees |
| What is Mountain and Hill? | A biome characterized by coniferous forests and extreme variations in temperature and amounts of precipitation |
| What is Parkland? | The biome in which the main plants are trees and grasses |
| What is Grassland? | A biome in which grass is the main vegetation and precipitation is low |
| What is Diversity? | A description of the variety of living things in an area |
| What is Extinction? | The elimination of a species from Earth |
| What is Species At Risk? | Plants and animals close to becoming extinct |
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