Across
1
Unit of force
6
Center of an atom or cell
7
Absolute temperature scale unit
9
Push or pull on an object
11
Measure of matter in an object
12
Blocking of light by a celestial body
Down
2
Magnetic metallic element
3
Path of a planet around the sun
4
Unit of heredity
5
Biological catalyst
8
Glass that splits light into spectrum
10
Gas essential for breathing