Across
1
Absolute temperature scale unit
4
Blocking of light by a celestial body
5
Our home planet
6
Measure of matter in an object
7
Compound containing oxygen
10
Fourth state of matter
11
Chemical element in table salt
14
Gas form of a liquid
Down
2
Unit of energy
3
Element found in all living things
6
The Red Planet
8
Curved glass that refracts light
9
Mass per unit volume
12
Reddish electrical conductor
13
Basic unit of life