Across
1
Push or pull on an object
5
Measure of matter in an object
6
Our home planet
9
Disturbance that transfers energy
11
Hottest planet in solar system
12
Reddish electrical conductor
Down
2
Amplified beam of light
3
Element found in all living things
4
Unit of energy
6
Blocking of light by a celestial body
7
Form of thermal energy
8
Biological catalyst
10
Gas form of a liquid