Across
1
Unit of energy
3
Unit of electric potential
4
Push or pull on an object
5
Measure of matter in an object
6
Unit of heredity
10
Molten rock beneath Earth surface
11
Unit of force
Down
2
Biological catalyst
3
Hottest planet in solar system
7
Our home planet
8
Gas essential for breathing
9
Amplified beam of light
12
Substance with pH below 7