Across
1
Tissue that contracts for movement
4
Mass per unit volume
7
Smallest unit of an element
8
Unit of energy
9
Preserved remains of ancient life
Down
1
The Red Planet
2
Element found in all living things
3
Disturbance that transfers energy
5
Chemical element in table salt
6
Icy body with a tail near the sun
10
Measure of matter in an object
11
Solid with repeating atomic pattern