Across
1
Hottest planet in solar system
5
Nerve cell in the brain
6
Compound containing oxygen
9
Unit of electric potential
10
Measure of matter in an object
11
Natural satellite of Earth
12
Icy body with a tail near the sun
14
Substance with pH above 7
Down
2
Force that attracts objects together
3
Unit of force
4
Chemical element in table salt
7
Curved glass that refracts light
8
Push or pull on an object
13
Positive particle in nucleus