Across
1
Measure of matter in an object
3
Push or pull on an object
4
Group of similar cells
6
Force that attracts objects together
7
Blocking of light by a celestial body
10
Precious yellow metallic element
Down
1
Tissue that contracts for movement
2
Mass per unit volume
3
Preserved remains of ancient life
5
Amplified beam of light
8
Ball of burning gas in space
9
Element found in all living things