Tectonic Plates and Seismic Waves

The video explains how stress in the Earth's crust, caused by tectonic plate movements, leads to earthquakes. It introduces seismic waves, specifically P waves and S waves, detailing their characteristics and effects. P waves are faster and less destructive, while S waves are slower and cause more damage due to their motion. The video highlights the importance of understanding these waves to assess earthquake risks.

What causes the release of built-up stress in the Earth's crust?

• Human activities

• Weather changes

• Volcanic eruptions

• Movement of tectonic plates

What happens when two tectonic plates grind against each other?

• They form mountains

• They cause stress to accumulate

• They create new landforms

• They produce volcanic eruptions

Which type of seismic wave is faster?

• Love waves

• Surface waves

• S waves

• P waves

How do P waves move through solid rock?

• By moving rock particles up and down

• By compressing and stretching the rock

• By rotating the rock particles

• By moving rock particles side to side

Why are S waves considered more dangerous during an earthquake?

• They occur more frequently

• They are less predictable

• They cause more damage to buildings

• They travel faster

What type of motion do S waves cause in rock particles?

• Rotational motion

• Up and down, and side to side motion

• Circular motion

• Forward and backward motion