Across
1
Center of an atom or cell
4
Unit of electric potential
6
Unit of energy
8
Unit of heredity
9
Our home planet
10
Curved glass that refracts light
12
Nerve cell in the brain
Down
2
Measure of matter in an object
3
Basic unit of life
4
Hottest planet in solar system
5
Group of similar cells
7
Push or pull on an object
11
Absolute temperature scale unit