Across
1
Absolute temperature scale unit
5
Glass that splits light into spectrum
6
Curved glass that refracts light
7
Push or pull on an object
8
Reddish electrical conductor
11
Mass per unit volume
15
Smallest unit of an element
Down
2
Hottest planet in solar system
3
Gas form of a liquid
4
Particle of light
9
Icy body with a tail near the sun
10
Solid with repeating atomic pattern
12
Unit of heredity
13
Our home planet
14
Chemical element in table salt