Across
1
Basic unit of life
2
Unit of power
5
Blocking of light by a celestial body
6
Our home planet
8
Chemical element in table salt
Down
1
Icy body with a tail near the sun
3
Unit of heredity
4
Center of an atom or cell
7
Magnetic metallic element
9
Path of a planet around the sun
10
Solid with repeating atomic pattern
11
Biological catalyst