Across
1
Unit of force
3
Chemical element in table salt
9
Naturally occurring inorganic solid
10
Unit of power
11
Our home planet
12
Gas form of a liquid
Down
2
Path of a planet around the sun
4
Positive particle in nucleus
5
Disturbance that transfers energy
6
Center of an atom or cell
7
Force that attracts objects together
8
Second lightest element
9
Natural satellite of Earth