Across
1
Our home planet
4
Biological catalyst
5
Smallest unit of an element
7
Element found in all living things
10
Group of similar cells
Down
2
Push or pull on an object
3
Force that attracts objects together
6
Natural satellite of Earth
7
Solid with repeating atomic pattern
8
Form of thermal energy
9
Nerve cell in the brain
11
Unit of heredity