Across
1
Force that attracts objects together
5
Element found in all living things
6
Precious yellow metallic element
7
Natural satellite of Earth
9
Tissue that contracts for movement
12
Ball of burning gas in space
Down
2
Smallest unit of an element
3
Tectonic landmass section
4
Reddish electrical conductor
8
Push or pull on an object
10
Unit of energy
11
Curved glass that refracts light