Primary General Science Glossary

This is a general primary science glossary. For class specific glossaries please go to the specific subjects

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The four seasons (autumn, winter, spring, summer) we experience on our planet are caused by the Earth's tilt as it rotates around the Sun.

Sedimentary rock

Sedimentary rocks like sandstone or chalk are formed over millions of years when sediments (tiny pieces of rocks and organic matter) are pressed together. 


Children learn about the body's five senses (hearing, sight, smell, touch and taste) as part of primary science.


A shadow is the darkness formed when light rays cannot pass through something.


Sieving is a method of separating mixtures of solids and liquids.

Simple machines

Simple machines work by turning small forces into larger ones, allowing us to perform tasks with more strength or speed. Examples of simple machines are levers, gears, pulleys, wheels and screws.


Solid is one of the three states of matter on Earth. A solid can hold its shape.


Sound is created when something vibrates and sends waves of energy (vibration) into our ears. 

States of matter

Matter makes up our planet and the whole universe. On Earth, all matter exists in one of three different states: solid, liquid or gas. Depending on its temperature, matter can change state; heating, cooling, evaporating and condensation are ways in which a material changes state.


A sun is a star, a giant ball of hot gas. Our Sun makes life possible on Earth.

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