Question | Answer |
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 |