Across
1
Solid with repeating atomic pattern
4
Magnetic metallic element
6
Reddish electrical conductor
7
Molten rock beneath Earth surface
8
Our home planet
9
Amplified beam of light
10
Basic unit of life
12
Unit of heredity
Down
2
Second lightest element
3
Blocking of light by a celestial body
5
Tectonic landmass section
11
Ball of burning gas in space