Across
1
Curved glass that refracts light
4
Nerve cell in the brain
6
Push or pull on an object
7
Smallest unit of an element
8
Solid with repeating atomic pattern
9
Hottest planet in solar system
10
Unit of heredity
Down
2
Glass that splits light into spectrum
3
Blocking of light by a celestial body
4
Unit of force
5
Mass per unit volume