States of Matter
solid has a definite shape and definite volume
A liquid has a definite volume, but no definite shape
A gas has no definite shape or volume. It will occupy the volume of whatever container it is in.
- In a solid, particles of matter are very close together and are held together by the attraction of the particles for one another.
- When a solid, such as ice, is heated, its particles move faster and farther apart. When the substance reaches its melting point, the solid changes to a liquid.
- Eventually the particles gain enough energy to escape. When the particles reach this point, the substance becomes a gas.
- All three states of matter exist on earth.
- Although most substances normally exist on Earth in just one state, all materials can exist as solids, liquids, or gases.
On the surface of Venus, which is very hot, lead would be a liquid rather than a solid as it is on Earth.