Across
1
Infectious microscopic agent
4
Push or pull on an object
5
Magnetic metallic element
6
Hottest planet in solar system
7
Unit of heredity
10
Curved glass that refracts light
Down
2
Group of similar cells
3
Blocking of light by a celestial body
8
Tissue that contracts for movement
9
Natural satellite of Earth
11
Icy body with a tail near the sun
12
Path of a planet around the sun
13
Absolute temperature scale unit