Across
1
Gas form of a liquid
3
Chemical element in table salt
4
Curved glass that refracts light
8
Second lightest element
9
Magnetic metallic element
10
Tissue that contracts for movement
Down
1
Infectious microscopic agent
2
Ball of burning gas in space
5
Path of a planet around the sun
6
Unit of heredity
7
Blocking of light by a celestial body
11
Hottest planet in solar system