Across
1
Element found in all living things
3
Chemical element in table salt
4
Unit of power
5
Absolute temperature scale unit
7
Unit of energy
9
Molten rock beneath Earth surface
10
Measure of matter in an object
13
Hottest planet in solar system
Down
1
Solid with repeating atomic pattern
2
Curved glass that refracts light
6
Glass that splits light into spectrum
8
Center of an atom or cell
11
Substance with pH above 7
12
Gas essential for breathing