Matter
Name: ______________________ Date: ____________
Write the letter of the matching definition next to each term.
1. Heat
A. What lets us see; the opposite of dark
2. Light
B. How tightly packed the matter in something is
3. Energy
C. How much matter something contains
4. Kinetic
D. Energy that travels in waves or particles
5. Potential
E. The difference in electrical charge between two points in a circuit expressed in volts
6. Chemical
F. Force that pulls objects toward the Earth
7. Atomic
G. A piece of photographic film showing an image with light and shade or colors reversed
8. Atom
H. The power to do work or make things move
9. Molecule
I. Of or relating to or comprising atoms
10. Photon
J. Center of an atom or a cell
11. Radiation
K. Substance used in or made by chemistry
12. Electron
L. Energy that makes things warm
13. Proton
M. Hopeful and optimistic; the opposite of negative
14. Neutron
N. The simplest structural unit of an element or compound
15. Density
O. An elementary particle with negative charge
16. Mass
P. A push or a pull
17. Gravity
Q. A stable particle with positive charge equal to the negative charge of an electron
18. Weight
R. An elementary particle with 0 charge and mass about equal to a proton
19. Vacuum
S. Distance travelled per unit time
20. Nucleus
T. The vertical force exerted by a mass as a result of gravity
21. Positive
U. The absence of matter
22. Negative
V. The smallest component of an element having the chemical properties of the element
23. Force
W. Relating to the motion of material bodies and the forces associated therewith
24. Velocity
X. A quantum of electromagnetic radiation