Across
1
Force that attracts objects together
3
Glass that splits light into spectrum
4
Nerve cell in the brain
5
Tectonic landmass section
8
Substance with pH above 7
9
Positive particle in nucleus
10
Absolute temperature scale unit
Down
2
Unit of power
3
Particle of light
5
Fourth state of matter
6
Gas essential for breathing
7
Infectious microscopic agent
11
Measure of matter in an object