Across
1
Substance with pH above 7
2
Reddish electrical conductor
4
Amplified beam of light
5
Tissue that contracts for movement
6
Positive particle in nucleus
10
Our home planet
11
Unit of heredity
Down
2
Element found in all living things
3
Chemical element in table salt
7
Push or pull on an object
8
Blocking of light by a celestial body
9
Biological catalyst
12
Unit of energy