Across
1
Infectious microscopic agent
2
Amplified beam of light
4
Center of an atom or cell
5
Naturally occurring inorganic solid
8
Push or pull on an object
Down
2
Curved glass that refracts light
3
Compound containing oxygen
6
Mass per unit volume
7
Blocking of light by a celestial body
9
Molten rock beneath Earth surface
10
Reddish electrical conductor