Across
1
Group of similar cells
4
Blocking of light by a celestial body
8
Hottest planet in solar system
9
Disturbance that transfers energy
11
Path of a planet around the sun
Down
2
Basic unit of life
3
Center of an atom or cell
4
Our home planet
5
Measure of matter in an object
6
Icy body with a tail near the sun
7
Magnetic metallic element
10
Substance with pH above 7