Lesson 4 & 5 Vocab Study Guide

2. to change state from a solid to a gas
4. a characteristic of matter
5. thermal energy transferred from a warmer object to a cooler one
6. the scientific law stating that matter cannot be created or destroyed
8. an individual particle of an element
12. the temperature at which a substance changes from a liquid to a gas as thermal energy is added to it
14. to change state from a gas to a solid
17. the state of matter in which atoms or molecules are closely packed and touching one another but are not held in fixed positions
18. a measure of the average kinetic energy of the particles of a substance
22. the state of matter in which atoms or molecules are completely separated from one another by empty space and can move around independently of one another
23. the physical form matter takes as determined by the arrangement and motion of its atoms or molecules
24. to change state from a liquid to a gas at the surface of the liquid
25. Energy released from the nucleus, the core of atoms, made up of protons and neutrons

1. the temperature at which a substance changes from a solid to a liquid as thermal energy is added to it
3. the total energy related to the motion of the atoms and molecules in an object or sample of matter
7. A renewable energy source from the sun
9. a property that describes how well one substance dissolves in another substance
10. to change state from a gas to a liquid
11. the state of matter in which atoms or molecules are closely packed and touching one another in fixed positions
13. Energy stored in the bonds of chemical compounds
15. Energy derived as a result of movement of electrons. It is transferred on wires.
16. a property that describes the mass of a certain volume of matter
19. the amount of matter in an object or sample; mass is measured in kilograms
20. Energy that is transferred by electromagnetic radiation
21. a group of two or more atoms that are held together by chemical bonds; a molecule has a unique composition and structure