Across
1
Gas essential for breathing
6
Substance with pH above 7
7
Form of thermal energy
8
Tectonic landmass section
9
Smallest unit of an element
10
Reddish electrical conductor
12
Path of a planet around the sun
Down
2
Push or pull on an object
3
Force that attracts objects together
4
Our home planet
5
Absolute temperature scale unit
11
Solid with repeating atomic pattern