Across
1
Magnetic metallic element
3
Natural satellite of Earth
4
Push or pull on an object
5
Unit of heredity
6
Group of similar cells
7
Glass that splits light into spectrum
9
Unit of electric potential
10
Naturally occurring inorganic solid
11
Icy body with a tail near the sun
Down
2
Biological catalyst
4
Preserved remains of ancient life
7
Particle of light
8
Path of a planet around the sun
12
Solid with repeating atomic pattern