SSA Questions

Esther had read about continental drift and that it had now become a theory. What information caused the hypothesis of continental drift to become a theory? (SC.7.E.6.3)

• Observations that earth appears to have plates with moving boundaries

• Observations that explain the movement of plates

• Observations that the lithosphere is broken apart, and these plates have no boundaries

• Observations that the ocean floor plates appear to be stable and unchanging

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Scientists theorize the continents were once closer together. What are two best observations that support this theory? (SC.7.E.6.3)

• The ocean temperatures have changed over time and how the continents have been eroded away

• Looking at how the animals evolve over time and how the continents fit together like a puzzle

• Hot spot islands formed and the amount of volcanoes have increased

• The fossil record and the mountain chains of South America and Africa

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What evidence did Alfred Wegener use to support his hypothesis? (SC.7.E.6.3)

• Ocean height over recorded history

• Human records and ancient settlements

• Measurement of continental height

• Fossils, climate, and rock records

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Scientists think the continents once formed a large, single landmass that broke apart, and the continents slowly drifted to their present locations. What is the name given to this claim?

• Continental slope

• Continental shelf

• Continental drift

• Continental rise

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Which layer is the youngest?

• G

• I

• H

• C

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Which type of evidence acts as a record of changes in species over time and indicates major changes in Earth’s surface and climate? (SC.7.E.6.4)

• movement of continents

• ripple marks and mud cracks

• fossil record

• composition of ice core samples

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Which layer is the oldest?

• I

• C

• A

• G

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What is radioactive dating? (SC.7.E.6.3)

• Determines age of rock based off the theory that rocks on the bottom have more radioactive elements then the rocks on top

• Measurement of the amount of radioactive material that a rock contains and can be used to estimate the age of the rock

• Measurement of the amount of radioactive fossils found in the rock which can be used to determine age

• Age of the rock based off of the location in which it was found

If a scientist wants to figure out the relative age of a layer of sediment what would they use? (SC.7.E.6.3)

• Rate of weathering

• Law of Superposition

• Core Sample

• Radioactive Dating

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What does the Law of Superposition state about the layers of sediment found on the Earth’s surface? (SC.7.E.6.3)

• The oldest layer is at the top and the sediment gets younger as you go down

• All layers of sediment are the same age roughly 4.6 billion years old

• The youngest layer of sediment is at the top and the layers get older as you go down

• All layers of sediment are the same age because of weathering, erosion, and deposition

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