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CE Science questions

Common Entrance (KS3) science questions

What is the metric unit for MASS? KILOGRAM(kg)
Name the third planet from the sun? EARTH
Is the moon a satellite, planet or star? SATELLITE
What is your approximate height: A: 1500mm, B: 15m, C: 500cm or D: 0.1km ? 1500mm
What is the normal melting point of water? 100°C
Name an instrument you would use to measure temperature: THERMOMETER
What is your approximate mass: A: 4.5kg, B: 45 000g, C: 0.01tonne or D: 150kg ? 4500g
How many planets are there in our solar system? 8 planets
What force holds a planet in orbit around the sun GRAVITY
What is the unit for force NEWTON
What is the unit for VOLUME? CUBIC CENTIMETRE (cm³)
What is the unit for current? AMPERE
Name an instrument you would use to measure the volume of a liquid: MEASURING CYLINDER
Two magnets, when brought together, repel. If the pole of one magnet is SOUTH what is the other pole? SOUTH
Does the arrow on a magnetic field line point towards the NORTH or SOUTH pole? NORTH pole
Which planet is nearest to the sun? MERCURY
What happens to the current through a component if the voltage is increased? (INCREASE, DECREASE or NOT CHANGE) INCREASE
What happens to the current in a circuit if the resistance is increased? A: increase, B: decease or C: stay the same DECREASE
What form of energy is stored in a battery? CHEMICAL
What form of energy is in a stretched elastic band STRAIN
What form of energy is stored in a spinning disk? KINETIC
During an eclipse of the sun the Earth, Sun and Moon are in line. Which would be in the middle? MOON
Name the metric unit for ENERGY JOULE
Name an instrument used for measuring CURRENT in a circuit: AMMETER
A bike waiting at the top of a hill would have what sort of energy GRAVITATIONAL
When coal burns chemical energy is converted to light energy and …?…. Energy HEAT
There are two forces on a floating boat. Which force pushes up and helps the boat float? UPTHRUST
An electric torch is switched on. Where does the energy come from that lights the bulb? The BATTERY
What name is given to the bending of light. REFRACTION
What name is given to the kind of switch that can be closed using a magnet. REED SWITCH
If a guitar string is plucked harder how would the sound change? It would sound LOUDER
If a guitar string is made tighter how would the sound change? The pitch would increase /sound higher
What is the unit for voltage ? VOLT
You hold a mass of 100g in the palm of your out-stretched hand. With what force does the mass press on your hand? 1NEWTON
Which would stretch the least A) a single spring B) two springs in parallel. C) two springs in series? Two strings in PARALLEL
Which would stretch the most A) a single spring B) two springs in parallel. C) two springs in series? Two strings in SERIES
Which would have the greater volume, 1kg of water, 1kg of wood or 1kg of aluminium?. 1 kg of WOOD
A brick measures 5cm x 5cm x 20cm.What is the volume of the brick? 500 cm³
To which galaxy does our Sun belong? The MILKY WAY
A brick measures 5cm x 5cm x 20cm and has a mass of 1000g. What is the DENSITY of the brick? 2 g/cm³
What is needed to make something change shape or change direction a FORCE
A man on a parachute is falling at a steady speed. Which is the larger force: Gravity is pulling him down or air resistance pushing up? They are the same size
Newtons per square centimetre is the unit of what measurement? PRESSURE
Grams per cubic centimetre is a unit for what property? DENSITY
What is the normal density of water? 1 g/cm³
Which will have more resistance, a single light bulb, or two bulbs in series or two in parallel? Two bulbs in series
What formula is used to calculate density? MASS ÷ VOLUME
What formula is used to calculate pressure? FORCE ÷ AREA
What force causes a moving car to slow down? FRICTION
How would the weight of an object change if it were taken to the Moon? The weight would GET LESS
How would the weight of an object change if it were taken to the Moon? The mass would STAY THE SAME
The formula DISTANCE ÷ TIME is used to calculate what? SPEED
What word is used to describe the rainbow of colours produced by a prism? SPECTRUM
What do we call the splitting of light caused by a prism? DISPERSION
What is the name of the force that slows down a man falling by parachute? AIR RESISTANCE
What is the approximate percentage of oxygen in the atmosphere? 21%
What percentage of the air is nitrogen? 78%
Approximately how many elements are there? about 100
What kind of liquid has a pH value less than pH7. ACID
Is a solution of magnesium oxide acidic, alkaline or neutral? ALKALINE
A very light metal used to make kitchen foil and saucepans. A good conductor of heat and electricity. ALUMINIUM
To show if a liquid contains water you could add it to what blue chemical? ANHYDROUS COBALT CHLORIDE
Name the solid formed formed when blue copper sulphate decomposes: ANHYDROUS COPPER SULPHATE
What name is given to the smallest part of an element? ATOM
What colour does copper turn when it is heated? BLACK
A piece of apparatus that burns gas and is used to heat apparatus. BUNSEN BURNER
Ca is the symbol for which chemical element? CALCIUM
What is the main compound present in limestone? CALCIUM CARBONATE
Name a non-metallic element that conducts electricity CARBON
What gas would be formed when carbon reacts with magnesium oxide? CARBON DIOXIDE
Name TWO substances released into the air when a candle burns. CARBON DIOXIDE and WATER
A way of separating a mixture of coloured dyes or pigments such as found in ink. CHROMATOGRAPHY
Is water a mixture, compound or element? COMPOUND
This is what happens when a gas turns to a liquid due to being cooled down. For example when steam touches a cold mirror. CONDENSE (condensation)
What solid product be formed if carbon was heated strongly with copper oxide. COPPER
What compound is formed when copper is heated in air? COPPER OXIDE
What kind of reaction takes place when calcium carbonate is heated strongly to form lime? DECOMPOSITION
What process of separation would you use to obtain fresh water from salty water (filtration, distillation or evaporation)? DISTILLATION
Is carbon a mixture, compound or element ELEMENT
What process of separation would you use to obtain salt from salty water (filtration, distillation or evaporation)? EVAPORATION
The liquid left behind after filtering. FILTRATE
What process of separation would you use to remove sand from salty water (filtration, distillation or evaporation)? FILTRATION
A substance has a melting point of -218°C and a boiling point of -183°C. Is it a solid liquid or gas? GAS
If copper sulphate were heated would it’s mass gain, get less or not change? GET LESS
Name a dense, yellow metal that is often used to make jewellery. GOLD
A form of carbon. The black substance inside pencils (the pencil lead). GRAPHITE
What is the chemical formula for water? H2O
Which gas burns with a squeeky 'pop' HYDROGEN
Two liquids that will not mix together (like oil and water) IMMISCIBLE
If some copper foil were heated strongly in air would it’s mass increase, decrease or not change? INCREASE
Pick an alkaline substance from: lemon juice, indigestion mixture, water, vinegar INDIGESTION MIXTURE
When a substance cannot dissolve. INSOLUBLE
In a common industrial process, carbon is heated with iron oxide. What everyday substance is being produced? IRON
What substance is used during the test for carbon dioxide gas LIMEWATER
A substance has a melting point of -39°C and a boiling point of 357°C. Is it a solid liquid or gas? LIQUID
Name an element that burns with a bright white flame MAGNESIUM
Pick out an alkaline oxide from the list below: A: sulphur dioxide, B: sodium chloride, C: magnesium oxide MAGNESIUM OXIDE
A substance that can be hammered into thin sheets. Includes most metals. Good examples are gold, copper or lead. MALLEABLE
CH4 is the formula for which gas? METHANE
Is air a mixture, compound or element? MIXTURE
The particle formed when two or more atoms chemically join together. MOLECULE .
What kind of liIs the oxide of hydrogen acidic, alkaline or neutral? NEUTRAL
What do we call the reaction between sodium hydroxide and hydrochloric acid. NEUTRALIZATION
Name the most abundant gas in the atmosphere NITROGEN
What would happen to a piece of copper if it were heated gently in a tube of nitrogen gas? NOTHING
What gas will relight a glowing splint? OXYGEN
What is the pH value of pure water? Ph 7
A scale of numbers (from 1 to 14)which shows how acidic or alkaline a liquid is. pH SCALE
What colour does anhydrous cobalt chloride turn whn added to water? PINK
What colour would universal indicator turn when added to oven cleaner (a strong alkali)? PURPLE
If Litmus indicator was added to a liquid of pH 5 what colour would it go? RED
The kind of reaction happens when we remove the oxygen from a compound. REDUCE (reduction)
A substance good at removing oxygen from a compound. (Eg magnesium) REDUCING AGENT
The solid remaining in the filter paper after filtering. RESIDUE
What common name is given to the chemical called sodium chloride? SALT
What solid chemical is formed when iron is added to siver nitrate solution SILVER
Which element has the symbol Na? SODIUM
What is the chemical name for the substance we call table salt? SODIUM CHLORIDE
Name the two products formed when sodium hydroxide reacts with hydrochloric acid SODIUM CHLORIDE AND WATER
A substance has a melting point of 113°C and a boiling point of 445°C. Is it a solid liquid or gas? SOLID
This is how we describe a substance that can be dissolved SOLUBLE
If some salt is dissolved in warm water the salt is called the A: solution, B: solute, C: solvent ? SOLUTE
This is the liquid obtained by dissolving one substance in another. SOLUTION
SOLID, LIQUID and GAS are known as this. STATES OF MATTER
Name a yellow element that burns to form an acidic oxide SULPHUR
Name a compound of sulphur that causes acid rain SULPHUR DIOXIDE
Flour is insoluble in water. When flour is shaken with water it will form a A: solution B: suspension C: filtrate SUSPENSION
What colour change would you see if water was added to anhydrous copper sulphate Turn BLUE
Pick a substance with a pH value less than Ph7: vinegar, water, limewater VINEGAR
Pick a neutral oxide from this list: Magnesium oxide, water, sulphur dioxide, carbon dioxide WATER
What colour is magnesium oxide WHITE
What colour is sulphur? YELLOW
Is a kidney best described as A: a cell, B: tissue, C: organ or D: organism? ORGAN
What organ in our body contains valves HEART
Name THREE features that would be found in ALL living cells. CYTOPLASM, NUCLEUS AND MEMBRANE
What is the normal pulse rate of a boy while resting? 80 bpm
Where can you easily measure the pulse? WRIST or NECK
What is the normal body temperature of a human 37 °C
Name three structures that would be found only in plant cells LARGE VACUOLE, CHLOROPLASTS and CELL WALL
To which group of animals does a FROG belong? AMPHIBIAN
How long does it take a human embryo to develop in the uterus? 9 months
In which cell structure does photosynthesis take place? CHLOROPLAST
What function is carried out by our bladder Stores URINE
What happens to your pulse during exercise? Pulse INCREASES
Enzymes help which process take place in our body? DIGESTION
A section from an animals liver would be best described as A: a cell, B: tissue, C: an organ or D: an organism. TISSUE
The place where an animal makes its home is called the A: habitat, B: environment or C: community ? HABITAT
Which organ in a mammal puts oxygen into the blood? LUNGS
What is the name of the process that releases energy in a cell? RESPIRATION
What do we call the process of breaking down food? DIGESTION
What is the approximate mass of a new born baby? A: about 100g, B:about 1kg, C: about 4kg, D: about 12kg about 4kg
What type of nutrient is provided by meat, cheese and eggs? PROTEIN
Which organ in our bodies is effected by a diet containing too much fat? HEART
What organ in a human allows nutrients to pass from the mother's blood to the blood of an embryo? PLACENTA
Which part of a plant cell is made of cellulose? CELL WALL
Name the waste gas produced during respiration CARBON DIOXIDE
How often does the girls body make an egg? every 28 days
What cell contains the male gamete used to fertilize an egg? SPERM
Which part of a cell provides it with energy MITOCHONDRIA
Which part of a cell contains chromosomes (DNA) NUCLEUS
What has to happen to an egg before it can start to develop into a baby? It has to be FERTILIZED
What is a zygote? a fertilized egg
What is a saprophye? A decay organism (Fungi and bacteria)
What organ is responsible for hearing and balance? EAR
Which organ manufactures sperm in a human? TESTIS
Where is the egg formed in a human? OVARY
What kind or organism lives on or in another living creature? PARASITE
What chemical is used to test for the presence of starch in food? IODINE
Where in the mother’s body does the embryo develop? UTERUS
Name the products of photosynthesis GLUCOSE and OXYGEN
Which part of a plant manufactures food by photosynthesis? Root, Flower, Stem or Leaves LEAVES
Which part of a plant is where the seeds are made? Root, Flower, Stem or Leaves FLOWER
Which part of the body removes soluble waste and excess water from the blood. KIDNEY
Which part of a plant absorbs water from the ground? Root, Flower, Stem or Leaves ROOT
When does photosynthesis take place in a plan, During the day, during the night or all the time? DURING THE DAY
Which kind of blood vessels carry oxygenated blood away from the heart? ARTERIES
What is the name of the process taking place when pollen lands on the stigma of a plant? POLLINATION
What do we call the holes on a plant leaf where gas exchange take place? STOMATA
What do we call the process by which a plant grows from a seed? GERMINATION
Name a gas released by plants during photosynthesis OXYGEN
From where do the producers in a food chain obtain their energy? The SUN
From where would the predator in an ecosystem obtain its energy? From another ANIMAL
The first organism in a food chain is always what? (Producer or consumer) a PRODUCER
Taking cuttings, budding, forming tubers and runners are all examples of what process? ASEXUAL reproduction
What biological process releases oxygen into the atmosphere? PHOTOSYNTHESIS
What green chemical, found in plant cells, is necessary for photosynthesis to take place? CHLOROPHYLL
What type of food do herbivores usually eat? PLANTS
Where is pollen made in a plant? top of the STAMEN (anther)
What type of chemical is a catalyst to help the process of digestion take place ENZYME
What type of nutrient is provided by starch and sugar? CARBOHYDRATE
Which cell contains the female gamete? OVUM (egg)
A type of animal that is awake during the night and sleeps during the day NOCTURNAL
A type of tree that looses its leaves in winter DECIDUOUS