Across
1
Substance with pH above 7
4
Chemical element in table salt
5
Element found in all living things
7
Mass per unit volume
8
Fourth state of matter
9
Tectonic landmass section
10
Molten rock beneath Earth surface
Down
2
Force that attracts objects together
3
Blocking of light by a celestial body
6
Smallest unit of an element
11
Disturbance that transfers energy