Across
1
Tectonic landmass section
5
Substance with pH above 7
7
Amplified beam of light
10
Basic unit of life
11
Gas essential for breathing
Down
2
Blocking of light by a celestial body
3
Force that attracts objects together
4
Form of thermal energy
6
Gas form of a liquid
8
Precious yellow metallic element
9
Preserved remains of ancient life