Across
1
Magnetic metallic element
4
Ball of burning gas in space
5
Naturally occurring inorganic solid
9
Unit of heredity
10
Measure of matter in an object
11
Natural satellite of Earth
Down
2
Second lightest element
3
Path of a planet around the sun
6
Nerve cell in the brain
7
Blocking of light by a celestial body
8
Solid with repeating atomic pattern
10
Molten rock beneath Earth surface