Across
1
Tectonic landmass section
3
Icy body with a tail near the sun
5
Naturally occurring inorganic solid
7
Solid with repeating atomic pattern
9
Absolute temperature scale unit
11
Amplified beam of light
Down
2
Substance with pH above 7
3
Basic unit of life
4
Blocking of light by a celestial body
6
Unit of force
8
Ball of burning gas in space
10
Second lightest element
12
Force that attracts objects together