Across
1
Form of thermal energy
4
Blocking of light by a celestial body
7
Curved glass that refracts light
9
Amplified beam of light
10
Infectious microscopic agent
11
Path of a planet around the sun
Down
2
Substance with pH above 7
3
Substance with pH below 7
5
Center of an atom or cell
6
Hottest planet in solar system
8
Push or pull on an object