Across
1
Disturbance that transfers energy
4
Smallest unit of an element
5
Center of an atom or cell
6
Biological catalyst
10
Magnetic metallic element
13
Unit of heredity
14
Unit of electric potential
Down
2
Ball of burning gas in space
3
Unit of force
7
Unit of energy
8
Icy body with a tail near the sun
9
The Red Planet
11
Second lightest element
12
Tectonic landmass section