Across
1
Blocking of light by a celestial body
2
Molten rock beneath Earth surface
7
Positive particle in nucleus
8
Nerve cell in the brain
9
Solid with repeating atomic pattern
Down
2
The Red Planet
3
Precious yellow metallic element
4
Gas essential for breathing
5
Glass that splits light into spectrum
6
Ball of burning gas in space
10
Chemical element in table salt
11
Biological catalyst
12
Magnetic metallic element
13
Path of a planet around the sun