Across
1
Second lightest element
5
Basic unit of life
6
Push or pull on an object
7
Chemical element in table salt
11
Solid with repeating atomic pattern
Down
2
Tectonic landmass section
3
Blocking of light by a celestial body
4
The Red Planet
8
Glass that splits light into spectrum
9
Disturbance that transfers energy
10
Measure of matter in an object
12
Infectious microscopic agent