Across
1
Our home planet
3
Tissue that contracts for movement
5
Amplified beam of light
6
Substance with pH below 7
7
Path of a planet around the sun
Down
2
Center of an atom or cell
4
Tectonic landmass section
7
Compound containing oxygen
Our home planet
Tissue that contracts for movement
Amplified beam of light
Substance with pH below 7
Path of a planet around the sun
Center of an atom or cell
Tectonic landmass section
Compound containing oxygen