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SVS KS3 Science

keywords to help with SATS exam

Acid A substance with a pH lower than 7
Air Resistance A force that acts against an object moving through air
Alkali A substance with a pH higher than 7
Ammeter Measures electric current
Antibiotic A chemical that works in the blood destroying bacteria e.g. penicillin
Antiseptic A chemical that kills germs e.g. TCP
Bacteria Small microbes
Boiling Changing a liquid into a gas by heating it
Carbon Dioxide A colourless gas which turns limewater cloudy
Carnivore An animal that only eats meat
Cell All living things are made of these
Cell Membrane A layer around the cell which controls what goes in and out
Cell Wall The outside layer of a plant cell that gives it its shape
Chloroplast Part of a plant cell containing chlorophyll. It traps sunlight so that the plant can make food
Combustion Burning – where a fuel reacts with oxygen to give out heat and light energy
Compound Two or more kinds of atoms joined together
Condensation The process that changes a gas into a liquid
Consumer Something that eats other plants and animals
Current The flow of electric charge in a circuit
Density How heavy something is compared to its size
Diffusion When particles spread out and mix without being stirred
Element Something which contains only one type of atom
Evaporation When a liquid changes into a gas
Filtration A way to separate small particles from a liquid
Freezing When a liquid changes into a solid
Friction A force when two surfaces rub together
Fuse A safety device fitted into plugs
Galaxy A group of stars and their solar systems
Habitat A place where plants and animals live
Herbivore An animal that only eats plants
Hydrogen A gas which makes a squeaky pop when a lit splint is put in it
Insoluble A substance that does not dissolve
Invertebrate An animal that doesn’t have a backbone
Joule The unit for measuring energy
Litmus An indicator that turns red in acid and blue in alkali
Melting When a solid changes into a liquid
Microbe A micro-organism
Molecule Two or more atoms joined together
Neutral A pH of 7 – it is neither an acid nor an alkali
Nucleus The part of a cell that controls what a cell does
Omnivore An animal that eats both plants and meat
Opaque When light does not travel through an object – you cannot see
through it
Oxygen A gas found in air that is needed for respiration and combustion
Photosynthesis The process that uses sunlight, water and CO2 produce glucose and O2 in plants
Predator An animal that hunts other animals for food
Prey An animal that is hunted by another animal
Producer A green plant that makes its own food
Properties The way elements look and behave
Respiration The process of converting glucose to energy (and releases CO2 and H2O)
Solute A substance that dissolves in a liquid
Solution The mixture that forms when a substance dissolves in a liquid
Translucent When some light travels through an object - you cannot see clearly through it
Transparent When light travels through an object – you can see through it
Upthrust A force that pushes an object upwards
Vacuole The area in a plant cell that contains cell sap
Vertebrate An animal that has a backbone
Virus Smallest type of microbe
Created by: docshort