Across
1
Icy body with a tail near the sun
3
Tectonic landmass section
4
Absolute temperature scale unit
6
Second lightest element
9
Gas essential for breathing
10
Glass that splits light into spectrum
12
Unit of force
13
Curved glass that refracts light
Down
2
Disturbance that transfers energy
3
Positive particle in nucleus
5
Unit of energy
7
Solid with repeating atomic pattern
8
Magnetic metallic element
11
Push or pull on an object