Across
1
The Red Planet
4
Measure of matter in an object
5
Unit of energy
8
Unit of force
9
Blocking of light by a celestial body
12
Absolute temperature scale unit
13
Mass per unit volume
14
Glass that splits light into spectrum
Down
2
Push or pull on an object
3
Chemical element in table salt
6
Smallest unit of an element
7
Gas essential for breathing
10
Gas form of a liquid
11
Form of thermal energy
15
Amplified beam of light