Protons have a positive charge. The number of protons in a nucleus determines the identity of the atom (element) and this number is called the atomic number.
D. Proton
Plants and algae are the two groups of organisms
Answer:
Air temperature: Ice, tree rings
Ocean temperature: Chemical isotopes in foraminifera
Carbon dioxide levels: Ice
Kinds of plants: Fossilized pollen grains
Rainfall: Tree rings
Explanation:
These are the correct answers.
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