Across
1
Group of similar cells
2
Preserved remains of ancient life
5
Fourth state of matter
7
Element found in all living things
9
Smallest unit of an element
10
Curved glass that refracts light
Down
2
Push or pull on an object
3
Form of thermal energy
4
Glass that splits light into spectrum
6
Substance with pH above 7
8
Chemical element in table salt