Across
1
Compound containing oxygen
5
Force that attracts objects together
6
Chemical element in table salt
7
Positive particle in nucleus
8
Unit of heredity
Down
2
Absolute temperature scale unit
3
Reddish electrical conductor
4
Curved glass that refracts light
7
Glass that splits light into spectrum
9
Icy body with a tail near the sun
10
Push or pull on an object