Across
1
Precious yellow metallic element
3
The Red Planet
4
Gas form of a liquid
5
Solid with repeating atomic pattern
8
Path of a planet around the sun
10
Infectious microscopic agent
Down
2
Reddish electrical conductor
3
Measure of matter in an object
6
Ball of burning gas in space
7
Curved glass that refracts light
9
Positive particle in nucleus