Across
1
Substance with pH above 7
3
Unit of energy
5
Basic unit of life
8
Amplified beam of light
Down
2
Second lightest element
4
Center of an atom or cell
6
Path of a planet around the sun
7
Blocking of light by a celestial body
Substance with pH above 7
Unit of energy
Basic unit of life
Amplified beam of light
Second lightest element
Center of an atom or cell
Path of a planet around the sun
Blocking of light by a celestial body