Across
1
Icy body with a tail near the sun
4
Tissue that contracts for movement
5
Center of an atom or cell
8
Path of a planet around the sun
10
Naturally occurring inorganic solid
13
Curved glass that refracts light
Down
2
Chemical element in table salt
3
Reddish electrical conductor
6
Magnetic metallic element
7
Absolute temperature scale unit
9
Push or pull on an object
11
Infectious microscopic agent
12
Gas form of a liquid
14
Our home planet