Across
1
The Red Planet
4
Substance with pH below 7
5
Mass per unit volume
7
Smallest unit of an element
Down
2
Force that attracts objects together
3
Ball of burning gas in space
6
Tectonic landmass section
8
Magnetic metallic element
The Red Planet
Substance with pH below 7
Mass per unit volume
Smallest unit of an element
Force that attracts objects together
Ball of burning gas in space
Tectonic landmass section
Magnetic metallic element