BMST Earth's Geological Cycles 4

Question 1

What drives deep ocean currents in the thermohaline circulation?

Accepted Answer

Differences in water temperature and salinity

Answer

Thermohaline circulation is driven by differences in water density caused by variations in temperature and salinity across the ocean.

Question 2

Which rock type can be found at all three stages of the rock cycle as a starting material?

Accepted Answer

Any of the three rock types

Answer

The rock cycle is continuous — any existing rock type can be weathered, melted, or metamorphosed to form another type.

Question 3

What is the name of the supercontinent that existed approximately 300 million years ago?

Accepted Answer

Pangaea

Answer

Pangaea was the supercontinent that existed roughly 300 million years ago before breaking apart into today's continents through plate tectonics.

Question 4

During the hydrological cycle, what process describes water moving from plant leaves into the atmosphere?

Accepted Answer

Transpiration

Answer

Transpiration is the process by which plants release water vapor through their leaves into the atmosphere.

Question 5

Which feature forms at a divergent boundary on the ocean floor?

Accepted Answer

Mid-ocean ridge

Answer

Mid-ocean ridges form at divergent boundaries where plates pull apart and magma rises to create new oceanic crust.

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