Across
1
Ball of burning gas in space
4
Substance with pH above 7
6
Push or pull on an object
7
Compound containing oxygen
10
Absolute temperature scale unit
11
Center of an atom or cell
Down
2
Gas form of a liquid
3
Group of similar cells
5
Naturally occurring inorganic solid
8
Path of a planet around the sun
9
Blocking of light by a celestial body