Across
1
Push or pull on an object
3
Hottest planet in solar system
5
Center of an atom or cell
8
Basic unit of life
11
Glass that splits light into spectrum
12
Unit of energy
13
Form of thermal energy
Down
2
Absolute temperature scale unit
4
Solid with repeating atomic pattern
6
Ball of burning gas in space
7
Reddish electrical conductor
8
Icy body with a tail near the sun
9
The Red Planet
10
Gas essential for breathing