Across
1
Preserved remains of ancient life
2
Glass that splits light into spectrum
3
Basic unit of life
4
Hottest planet in solar system
6
Form of thermal energy
9
Precious yellow metallic element
10
Our home planet
11
Force that attracts objects together
12
Biological catalyst
Down
2
Tectonic landmass section
3
Solid with repeating atomic pattern
5
Path of a planet around the sun
7
Chemical element in table salt
8
Push or pull on an object
13
Substance with pH below 7