Across
1
Substance with pH below 7
4
Blocking of light by a celestial body
6
Biological catalyst
9
Disturbance that transfers energy
10
Solid with repeating atomic pattern
11
Reddish electrical conductor
13
Infectious microscopic agent
Down
2
Amplified beam of light
3
Naturally occurring inorganic solid
5
Chemical element in table salt
7
Hottest planet in solar system
8
Compound containing oxygen
12
Our home planet