Across
1
Our home planet
4
Tissue that contracts for movement
5
Natural satellite of Earth
6
Form of thermal energy
10
Group of similar cells
11
Force that attracts objects together
13
Curved glass that refracts light
Down
2
Unit of force
3
Glass that splits light into spectrum
7
Chemical element in table salt
8
Solid with repeating atomic pattern
9
Blocking of light by a celestial body
12
Molten rock beneath Earth surface
14
Unit of electric potential