Across
1
Unit of force
4
Tissue that contracts for movement
5
Push or pull on an object
9
Second lightest element
10
Substance with pH above 7
Down
2
Chemical element in table salt
3
Icy body with a tail near the sun
6
Unit of heredity
7
Disturbance that transfers energy
8
Blocking of light by a celestial body
11
Smallest unit of an element