Across
1
Ball of burning gas in space
2
Glass that splits light into spectrum
3
Preserved remains of ancient life
5
Icy body with a tail near the sun
8
Reddish electrical conductor
9
Absolute temperature scale unit
10
Force that attracts objects together
13
Nerve cell in the brain
14
Substance with pH below 7
Down
2
Fourth state of matter
4
Tissue that contracts for movement
6
Blocking of light by a celestial body
7
Path of a planet around the sun
11
Positive particle in nucleus
12
Measure of matter in an object