4.Methods employed to estimate paleoenvironmental conditions include pollen coun

Question

4.Methods employed to estimate paleoenvironmental conditions include

pollen counts

tree ring studies

stratigraphic records

oxygen isotopes

all of the above

5.The ratio of oxygen-16 and oxygen-18 isotopes in plankton fossils in deep-sea sediments can be used to determine ________.

past carbon dioxide concentrations

past temperatures

the age of the fossils

water depth

seawater pH

6.Which variables do Milankovic cycles take into account?

depth and velocity of ocean currents

Earth's orbit and tilt

rates of photosynthesis and cellular respiration

rates of ice accumulation and ablation

ocean salinity, depth, and current velocity

pollen counts

tree ring studies

stratigraphic records

oxygen isotopes

all of the above

Explanation / Answer

4. Methods employed to estimate paleoenvironmental conditions include all of the above.

5.The ratio of oxygen-16 and oxygen-18 isotopes in plankton fossils in deep-sea sediments can be used to determine past temperatures.

6. Milankovic cycles take into account earth's orbit and tilt

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