June 2021 (v202) Earth Science Regents Questions 21-30

Test Description: Use your knowledge of Earth Science to answer all questions in the data set. You will need your Earth Science reference tables and a calculator to answer some of the questions. Good Luck.

Instructions: Answer all questions to get your test result.

The geologic cross section below represents a portion of Earth’s crust. The rock layers have not been overturned.

1) The inclusions were most likely broken off from their original rock layers

While studying sediments deposited during and after the last ice age, scientists discovered that foraminiferid shells coil in different directions when they grow under different temperature conditions, as shown in the diagram below.

2) Foraminiferid shells found in layer X most likely coiled to the

3) Approximately how many million years ago (mya) was the amount of Earth’s total landmass located south of the equator the greatest?

4) Which layer of Earth’s interior is inferred to be composed of solid iron and nickel?

The graph below shows the rate of decay of a radioactive isotope through two half-lives. Each box shows the ratio of atoms of the radioactive isotope to atoms of the disintegration product. The box at two half-lives has been left blank.

5) Which box best represents the ratio of these atoms at two half-lives?

6) The first S-wave reaches a seismic station 22 minutes after an earthquake occurred. How long did it take the first P-wave to reach the same seismic station?

The block diagram below represents the formation of an island arc near a plate boundary.

7) An island arc is located near the boundary between which two tectonic plates?

8) Which table correctly matches the average density and composition of continental and oceanic crusts?

The photograph below shows a portion of the San Andreas Fault in the western United States.

9) The San Andreas Fault is an example of a

10) What is the minimum stream velocity necessary to transport a quartz particle that is 0.1 centimeter in diameter in a stream?


*select an answer for all questions

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