Across
1
Gas essential for breathing
5
Naturally occurring inorganic solid
6
Precious yellow metallic element
7
Glass that splits light into spectrum
8
Path of a planet around the sun
11
Push or pull on an object
Down
2
Force that attracts objects together
3
Smallest unit of an element
4
Basic unit of life
9
Unit of force
10
Preserved remains of ancient life
12
Magnetic metallic element