Answer:
I don't think much would change more animals would have lot of food and we would have lot of air
Answer:
the four types of chemical weathering are:
oxidation
hydrolysis
hydration
carbonation
A, i think, hope this helps:)
Answer:

Explanation:
An element only has <u>one</u> type of atom and cannot be broken down by chemical means.
Let's analyze the answer choices.
1. This has two types of atoms, so it cannot be an element. It has more than one type of atom.
2. This has two types of atoms that are bonded together. It cannot be an element because there is more than one type of atom and the bonds can be broken.
3. This has one type of atoms, so it is an element.
Therefore the best answer choice is 3.