Across
1
The Red Planet
4
Our home planet
5
Chemical element in table salt
9
Path of a planet around the sun
10
Hottest planet in solar system
11
Center of an atom or cell
Down
2
Curved glass that refracts light
3
Force that attracts objects together
6
Measure of matter in an object
7
Tissue that contracts for movement
8
Unit of electric potential