Across
1
Positive particle in nucleus
5
Icy body with a tail near the sun
7
Biological catalyst
9
Ball of burning gas in space
Down
2
Push or pull on an object
3
Unit of force
4
Nerve cell in the brain
6
Unit of power
8
Mass per unit volume
Positive particle in nucleus
Icy body with a tail near the sun
Biological catalyst
Ball of burning gas in space
Push or pull on an object
Unit of force
Nerve cell in the brain
Unit of power
Mass per unit volume