Across
1
Tissue that contracts for movement
3
Smallest unit of an element
5
Ball of burning gas in space
7
Curved glass that refracts light
8
Natural satellite of Earth
9
Unit of electric potential
11
Amplified beam of light
Down
1
Molten rock beneath Earth surface
2
Substance with pH below 7
4
Solid with repeating atomic pattern
6
Icy body with a tail near the sun
9
Hottest planet in solar system
10
Blocking of light by a celestial body