Across
1
Blocking of light by a celestial body
5
Smallest unit of an element
7
Unit of force
9
Glass that splits light into spectrum
10
Magnetic metallic element
11
Force that attracts objects together
12
Push or pull on an object
Down
2
Gas essential for breathing
3
Gas form of a liquid
4
Center of an atom or cell
6
Naturally occurring inorganic solid
8
Unit of electric potential
13
Natural satellite of Earth
14
Substance with pH above 7