Across
1
Unit of power
3
The Red Planet
5
Compound containing oxygen
8
Center of an atom or cell
Down
2
Amplified beam of light
4
Smallest unit of an element
6
Path of a planet around the sun
7
Second lightest element
Unit of power
The Red Planet
Compound containing oxygen
Center of an atom or cell
Amplified beam of light
Smallest unit of an element
Path of a planet around the sun
Second lightest element