Across
1
Curved glass that refracts light
4
Molten rock beneath Earth surface
5
Icy body with a tail near the sun
7
Push or pull on an object
10
Glass that splits light into spectrum
Down
2
Element found in all living things
3
Second lightest element
5
Reddish electrical conductor
6
Form of thermal energy
8
Natural satellite of Earth
9
Smallest unit of an element