Across
1
Ball of burning gas in space
2
Tissue that contracts for movement
3
Measure of matter in an object
4
Second lightest element
5
Our home planet
7
Hottest planet in solar system
8
Path of a planet around the sun
Down
1
Chemical element in table salt
2
Naturally occurring inorganic solid
4
Form of thermal energy
6
Curved glass that refracts light