Across
1
Glass that splits light into spectrum
4
Icy body with a tail near the sun
5
Tissue that contracts for movement
6
Particle of light
12
Element found in all living things
13
Magnetic metallic element
Down
2
Nerve cell in the brain
3
Molten rock beneath Earth surface
7
Push or pull on an object
8
Preserved remains of ancient life
9
Curved glass that refracts light
10
Precious yellow metallic element
11
Path of a planet around the sun