Across
1
Element found in all living things
4
Positive particle in nucleus
5
Force that attracts objects together
7
Disturbance that transfers energy
9
Naturally occurring inorganic solid
Down
2
Smallest unit of an element
3
Magnetic metallic element
6
Molten rock beneath Earth surface
8
Blocking of light by a celestial body
10
Nerve cell in the brain
11
Substance with pH above 7