Across
1
Disturbance that transfers energy
3
Element found in all living things
4
Measure of matter in an object
6
Group of similar cells
9
Gas form of a liquid
10
Basic unit of life
11
Biological catalyst
Down
2
Ball of burning gas in space
3
Reddish electrical conductor
5
Our home planet
7
Absolute temperature scale unit
8
Second lightest element
12
Precious yellow metallic element
13
Amplified beam of light