Across
1
Element found in all living things
3
Force that attracts objects together
6
Icy body with a tail near the sun
7
Unit of force
8
Molten rock beneath Earth surface
9
Infectious microscopic agent
10
Second lightest element
Down
2
Path of a planet around the sun
4
Smallest unit of an element
5
Absolute temperature scale unit
8
Naturally occurring inorganic solid
11
Gas essential for breathing