Across
1
Blocking of light by a celestial body
5
Positive particle in nucleus
6
Smallest unit of an element
7
Tissue that contracts for movement
9
Precious yellow metallic element
Down
2
Naturally occurring inorganic solid
3
Second lightest element
4
Measure of matter in an object
8
Nerve cell in the brain
10
Unit of electric potential
11
Compound containing oxygen