Across
1
Hottest planet in solar system
4
Our home planet
5
Solid with repeating atomic pattern
9
Force that attracts objects together
11
Tissue that contracts for movement
13
Unit of force
Down
1
Unit of electric potential
2
Ball of burning gas in space
3
Tectonic landmass section
6
The Red Planet
7
Path of a planet around the sun
8
Substance with pH above 7
10
Naturally occurring inorganic solid
12
Gas essential for breathing