Across
1
Magnetic metallic element
3
Tissue that contracts for movement
6
Absolute temperature scale unit
7
Preserved remains of ancient life
8
Ball of burning gas in space
9
Unit of force
11
Force that attracts objects together
12
Amplified beam of light
Down
2
Curved glass that refracts light
4
Substance with pH above 7
5
Hottest planet in solar system
7
Push or pull on an object
10
Gas essential for breathing