Across
1
Substance with pH above 7
4
Glass that splits light into spectrum
5
Form of thermal energy
6
Blocking of light by a celestial body
7
Natural satellite of Earth
11
Curved glass that refracts light
Down
2
Unit of heredity
3
Smallest unit of an element
4
Particle of light
8
Measure of matter in an object
9
Solid with repeating atomic pattern
10
Compound containing oxygen