Science Vocabulary

5. the temperature at which its vapor pressure is equal to the pressure of the gas above it.
6. a sample of matter that conforms to the shape of a container in which it is held.
8. the measure of hotness or coldness expressed in terms of any of several scales, including Fahrenheit and Celsius.
9. a state of matter that retains its shape and density when not confined.
10. a form of matter in which many of the electrons wander around freely among the nuclei of the atoms.
13. the process by which water vapor in the air is changed into liquid water.
14. a state of matter that has no fixed shape and no fixed volume.
15. conversion of a substance from the liquid or solid phase into the gaseous phase.

1. temperature at which the solid and liquid forms of a pure substance can exist in equilibrium.
2. temperature at which a liquid becomes a solid.
3. explains the states of matter, and is based on the idea that matter is composed of tiny particles that are always in motion.
4. change of a solid into a liquid when heat is applied.
7. the temperature at which the vapour pressure of the liquid is exactly equal to the external pressure.
11. the phase change of a substance from the liquid state to a solid-state.
12. substance which has mass and occupies space.