Across
1
Amplified beam of light
3
Icy body with a tail near the sun
5
Gas form of a liquid
7
Nerve cell in the brain
8
Smallest unit of an element
9
Basic unit of life
Down
2
Magnetic metallic element
3
Solid with repeating atomic pattern
4
Disturbance that transfers energy
6
Tissue that contracts for movement
10
Blocking of light by a celestial body