Across
1
Unit of force
4
Push or pull on an object
5
Molten rock beneath Earth surface
6
Path of a planet around the sun
7
Glass that splits light into spectrum
8
Reddish electrical conductor
9
Absolute temperature scale unit
Down
2
Form of thermal energy
3
Icy body with a tail near the sun
5
Naturally occurring inorganic solid
8
Element found in all living things
10
Positive particle in nucleus
11
Gas essential for breathing
12
Blocking of light by a celestial body