Across
1
Amplified beam of light
4
Absolute temperature scale unit
6
Naturally occurring inorganic solid
8
Center of an atom or cell
Down
2
Smallest unit of an element
3
Group of similar cells
5
Basic unit of life
7
Measure of matter in an object
9
Blocking of light by a celestial body
10
Hottest planet in solar system
11
Magnetic metallic element