THEARMAL ENERGY

4. when something becomes different over time
6. the moment when two objects hit each other
9. heater: a heating unit that stores and warms water
10. energy: the total kinetic energy of all the molecules that make up a sample
15. the ability to make things move or change
16. a balanced state in which a system is stable, such as when two or more samples are at the same temperature
17. to move from one object to another or one place to another
19. a measure of how hot or cold something is

1. tiny organisms that are made of a single cell
2. a group of atoms joined together in a particular way
3. to make something safe to eat or drink by heating it
5. a number that summarizes a set of data and that can be computed by adding all the numbers in a list and then dividing by the number of numbers in the list
7. a small part that is meant to show what the whole is like
8. energy: the energy that an object has because it is moving
11. water that is underground
12. anything that has mass and takes up space
13. to reach a conclusion using evidence and reasoning
14. when something stays mostly the same over time
18. a set of interacting parts forming a complex whole