Across
1
Tissue that contracts for movement
3
Molten rock beneath Earth surface
6
Positive particle in nucleus
8
Basic unit of life
9
Magnetic metallic element
Down
2
Smallest unit of an element
4
Element found in all living things
5
Mass per unit volume
7
Push or pull on an object
10
Unit of power
11
Icy body with a tail near the sun