Across
1
Blocking of light by a celestial body
3
Tectonic landmass section
4
Ball of burning gas in space
5
The Red Planet
8
Form of thermal energy
10
Substance with pH above 7
Down
1
Our home planet
2
Path of a planet around the sun
3
Glass that splits light into spectrum
6
Measure of matter in an object
7
Smallest unit of an element
9
Unit of force