Across
1
Curved glass that refracts light
2
Gas essential for breathing
4
Preserved remains of ancient life
7
Solid with repeating atomic pattern
Down
2
Compound containing oxygen
3
Unit of force
5
Form of thermal energy
6
Substance with pH above 7
Curved glass that refracts light
Gas essential for breathing
Preserved remains of ancient life
Solid with repeating atomic pattern
Compound containing oxygen
Unit of force
Form of thermal energy
Substance with pH above 7