Across
1
Element found in all living things
3
Preserved remains of ancient life
4
Our home planet
7
Precious yellow metallic element
9
Ball of burning gas in space
10
Chemical element in table salt
11
Magnetic metallic element
12
Unit of heredity
Down
1
Icy body with a tail near the sun
2
Particle of light
5
Path of a planet around the sun
6
Unit of force
8
Reddish electrical conductor