Across
1
Mass per unit volume
5
Unit of heredity
7
Force that attracts objects together
9
Amplified beam of light
11
Magnetic metallic element
Down
2
Blocking of light by a celestial body
3
Substance with pH above 7
4
Tectonic landmass section
6
Precious yellow metallic element
8
Ball of burning gas in space
10
Group of similar cells