Across
1
Unit of force
3
The Red Planet
4
Amplified beam of light
7
Particle of light
8
Naturally occurring inorganic solid
9
Gas essential for breathing
Down
2
Magnetic metallic element
3
Molten rock beneath Earth surface
5
Nerve cell in the brain
6
Blocking of light by a celestial body
10
Icy body with a tail near the sun