Across
1
Unit of force
4
Biological catalyst
7
Solid with repeating atomic pattern
8
Group of similar cells
9
Force that attracts objects together
10
Compound containing oxygen
Down
2
Our home planet
3
Push or pull on an object
5
Particle of light
6
Chemical element in table salt
11
Unit of power
12
Ball of burning gas in space
13
Measure of matter in an object