Question

how are tsunamis, earthquakes, and tectonic plate movement related?

• earthquakes cause plate movement, which causes tsunamis.
• plate movement causes earthquakes, which cause tsunamis.
• plate movement causes tsunamis, which cause earthquakes.
• tsunamis cause earthquakes, which cause plate movement.

Explanation:

To determine the correct relationship, we analyze the geological processes: Tectonic plate movement (due to convection currents in the mantle) can cause stress to build up at plate boundaries. When this stress is released, it causes an earthquake. Earthquakes that occur under the ocean (or near coastal areas) can displace large volumes of water, leading to tsunamis.

• The first option is incorrect because earthquakes are a result of plate movement, not the cause of it.
• The third option is incorrect because plate movement does not directly cause tsunamis; it causes earthquakes which can then cause tsunamis.
• The fourth option is incorrect because tsunamis are a result of earthquakes (or other underwater disturbances), not the cause of earthquakes.
• The second option correctly states that plate movement causes earthquakes, and earthquakes (especially underwater ones) can cause tsunamis.

Answer:

B. Plate movement causes earthquakes, which cause tsunamis.