Across
1
Reddish electrical conductor
3
Center of an atom or cell
4
Push or pull on an object
5
Absolute temperature scale unit
7
Molten rock beneath Earth surface
8
Biological catalyst
9
Chemical element in table salt
10
Unit of power
12
Substance with pH below 7
Down
2
Force that attracts objects together
3
Unit of force
6
Infectious microscopic agent
7
Measure of matter in an object
11
Glass that splits light into spectrum
13
Icy body with a tail near the sun