Thermal Energy

3. variables that are kept the same between both groups because they should not affect the results
8. matter changes _____ when energy is added or removed
10. variable that is measured (ex: data such as height, speed, how many ducks, etc.)
12. made up of a single element or compound that has the same properties throughout
14. made up of two or more elements or compounds NOT chemically joined together
16. transfer of energy through electromagnetic waves
18. transfer of energy through fluid (liquid or gas) movement
19. how spaced out particles are and how fast they move has a _____ relationship with the amount of thermal energy of the particles
21. particles vibrate in place
23. energy in motion
25. measures weight based on mass
27. the amount of substance you have
29. the opposite of what happens to one variable happens to the other
30. anything that has mass and volume

1. the amount of space a substance takes up
2. particles _____ energy when they go from liquid to solid
4. the force of gravity on an object (gravity x mass)
5. no matter can get in or out of the system (No change in mass)
6. transfer of energy through direct contact with a solid
7. when a gas goes directly to a solid, skipping the liquid phase
9. measurement of the average amount of motion in particles of matter
11. naturally occurring substance
13. a group of interacting parts that work together to form a complex whole
15. consists of 2 or mole chemically combined elements
17. the transfer of thermal energy between objects or systems at different temperatures
20. variable that is changed by the scientist and used to design an experiment; the one difference between experimental and control groups
22. average kinetic energy of particles in a substance
24. matter can get in and out of it through openings in the system (Matter has mass, thus change in mass)
26. matter with no definite shape but a definite volume
28. visual representation that explains what is happening in a system