Across
1
Absolute temperature scale unit
2
Measure of matter in an object
5
Magnetic metallic element
6
Naturally occurring inorganic solid
7
The Red Planet
9
Basic unit of life
10
Push or pull on an object
Down
2
Tissue that contracts for movement
3
Amplified beam of light
4
Nerve cell in the brain
8
Fourth state of matter
11
Icy body with a tail near the sun
12
Center of an atom or cell