5) How can pollen be used to infer climate? Pollen is a product of vegetation th

Question

5) How can pollen be used to infer climate?

Pollen is a product of vegetation that is climate dependent

Pollen distribution

Both a and b are correct.

None of the above

6) Isotopes are any of two or more forms of the same chemical element that have different numbers of _______.

protons

neutrons

electorns

All of the above

None of the above

7) Which of the following oxygen isotopes is more abundant in nature?

Oxygen 16

Oxygen 20

Oxygen 18

None of the above

8) Where are we likely to find evidence of the oxygen that existed in previous geologic time?

Shells of organisms on the ocean floor

Shells of currently living organisms

Sand on the beach

All of the above

Explanation / Answer

5) Pollen is a product of vegetation that is climate dependent and Pollen distribution both can be used to infer climate,

6) Isotopes are any of two or more forms of the same chemical element that have different numbers of neutrons but the same number of protons.

7) Oxygen 16 is more abundant in nature because it is a principal product of stellar evolution and it is a primary isotope, meaning it can be made by stars that were initially made exclusively of hydrogen.

8) Shells of organisms on the ocean floor, Shells of currently living organisms and sand on the beach are the places where are we likely to find evidence of the oxygen that existed in the previous geologic time.

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