Across
1
Substance with pH below 7
2
Molten rock beneath Earth surface
3
Disturbance that transfers energy
5
Magnetic metallic element
6
Curved glass that refracts light
8
Blocking of light by a celestial body
Down
2
Tissue that contracts for movement
4
Solid with repeating atomic pattern
7
Substance with pH above 7
9
Gas essential for breathing
10
Biological catalyst