Across
1
Reddish electrical conductor
4
Precious yellow metallic element
5
Measure of matter in an object
6
Tissue that contracts for movement
8
Absolute temperature scale unit
11
Magnetic metallic element
Down
2
Center of an atom or cell
3
Gas essential for breathing
5
Molten rock beneath Earth surface
7
Gas form of a liquid
9
Blocking of light by a celestial body
10
Icy body with a tail near the sun