the answer is 21<span>% oxygen, </span>
Fog begins to form when water vapor condenses into tiny liquid water droplets that are suspended in the air.
1. B 2. C 3.A 4. A molecule is when two or more atoms join together. An element makes up the atoms that form molecules. 5. Similarities include both are cells and each cell are surrounded by cell membranes. 6.A fish is an organism and a rock is not because fish contain the characteristics needed for life, while a rock does not.
All living things are made up of more than one cell