Across
1
Second lightest element
4
Group of similar cells
6
Fourth state of matter
7
The Red Planet
Down
2
Substance with pH above 7
3
Unit of energy
5
Smallest unit of an element
8
Disturbance that transfers energy
Second lightest element
Group of similar cells
Fourth state of matter
The Red Planet
Substance with pH above 7
Unit of energy
Smallest unit of an element
Disturbance that transfers energy