Across
1
Basic unit of life
4
Tectonic landmass section
5
Infectious microscopic agent
6
Natural satellite of Earth
Down
2
Mass per unit volume
3
Second lightest element
4
Positive particle in nucleus
7
Compound containing oxygen
Basic unit of life
Tectonic landmass section
Infectious microscopic agent
Natural satellite of Earth
Mass per unit volume
Second lightest element
Positive particle in nucleus
Compound containing oxygen