Across
1
Reddish electrical conductor
3
Substance with pH above 7
5
Measure of matter in an object
6
Second lightest element
7
Basic unit of life
8
Unit of energy
10
Chemical element in table salt
Down
2
Disturbance that transfers energy
4
Blocking of light by a celestial body
5
Molten rock beneath Earth surface
7
Icy body with a tail near the sun
9
Gas form of a liquid