Across
1
Force that attracts objects together
4
Push or pull on an object
5
Natural satellite of Earth
8
Amplified beam of light
9
Naturally occurring inorganic solid
10
Positive particle in nucleus
13
Tectonic landmass section
15
Unit of force
Down
2
Element found in all living things
3
Smallest unit of an element
6
Center of an atom or cell
7
Ball of burning gas in space
11
Path of a planet around the sun
12
Particle of light
14
Disturbance that transfers energy