Key Words List
Battery – A source of power in a simple circuit.
Circuit – A path through which an electric current flows.
Classification – Organising living things into groups through identifying similarities.
Current – The flow of electrons around a circuit.
Dissolve – To become part of the liquid, making a solution.
Electricity – A form of energy.
Electrons – Small particles which are found in wires.
Habitat – The home of an animal.
Insoluble – Cannot dissolve in water.
Invertebrate – An animal which does not have a backbone.
Key – A tool used to work out which group a living thing belongs to.
pH – A measure of the acidity or alkalinity of a substance.
Reversible – Can be changed back into what it was before.
Science – A system of observation and experimentation used to learn how the world works.
Soluble – Can dissolve in water.
Solution – A liquid containing water and something else.
Universal Indicator – A liquid that can be used to show the pH of a substance by changing colour.
Vertebrate – An animal which does have a backbone.
Voltage – The push which allows electrons to move.