Across
1
Substance with pH above 7
4
Unit of heredity
5
Center of an atom or cell
6
Icy body with a tail near the sun
Down
2
Fourth state of matter
3
Blocking of light by a celestial body
5
Nerve cell in the brain
7
Form of thermal energy
Substance with pH above 7
Unit of heredity
Center of an atom or cell
Icy body with a tail near the sun
Fourth state of matter
Blocking of light by a celestial body
Nerve cell in the brain
Form of thermal energy