Unit 2 Vocabulary

2. – the amount of matter in a given space
5. – matter in which molecules are very close together and cannot move around; have a defined shape and volume
8. – anything that has a mass and takes up space
9. Mixture – mixture in which components are evenly distributed out on a microscopic measure
10. Change – a change in a substance that alters the composition of the substance into a new substance
14. – matter in which gas is heated to the point that some electrons are stripped away
15. Mixture – mixture in which components are not evenly distributed
16. Change – a change in a substance that alters the substance without changing the composition of the substance

1. – matter in which the molecules are close together and move around slowly; have an undefined shape and defined volume
3. – matter in which molecules are widely separated, move around freely, and move at high speeds; have undefined shape and volume
4. – a pure chemical substance made of the same type of atom
6. Property – properties that can ONLY be observed or measured by changing the chemical identity of a substance
7. Theory – an explanation of how particles in matter behave
11. – contains atoms of different elements chemically combined in a fixed ratio
12. Condensate – state of matter in which molecules do not move because they are at absolute zero (coldest temperature…first molecule at BEC was in 2024!!!)
13. Property – properties that can be observed directly or measured without changing the chemical identity of the substance