turn it in on time

4. anything that takes up space and can be weighed
6. to give up possession of on claim or demand
8. an elementary particle that has a negative charge of electricity
12. The smallest part of a substance that cannot be broken down chemically
13. type of matter that has no defined shape or volume.
14. a measure of how fast or slow something moves.
16. degree of hotness or coldness measured by a thermometer with a numerical scale.
17. two or more substances that are mixed together
20. A small, positively charged particle of matter found in the atoms of all elements.
22. can flow and does not have a specific shape like a solid.
23. visual perception that enables one to differentiate otherwise identical objects.
24. chemical reactions in which the reactants absorb heat energy from the surroundings to form products.
25. The highest surface part of a wave
26. measurement of the number of times that a repeated event occurs per unit of time.
27. amount of matter in a particle or object.
28. any atom or group of atoms that bears one or more positive or negative electrical charges.

1. large celestial body that revolves around the sun in fixed orbits
2. rotating machine that transforms electrical energy into mechanical energy.
3. has a sensible and reasonable attitude towards life
5. when light bounces off an object.
7. substance made from two or more different elements that have been chemically joined.
9. A basic part of a whole.
10. how easily a substance reacts chemically with other substances.
11. the measure of the capacity that an object holds.
12. force by which one object attracts another,
15. noise, something you can hear if you're in the right spot and it's loud enough.
18. mutual attraction between all masses in the universe, also known as gravitational attration.
19. the rate of change of velocity.
21. one of the organelles in the cell.
28. material that is a poor conductor