Shake Things Up

The video explains earthquakes, caused by tectonic plates moving and releasing energy as seismic waves. It covers how earthquakes are measured using the Richter and Mercali scales, and provides safety tips for earthquake preparedness. The Richter scale measures magnitude based on seismic wave amplitude, while the Mercali scale assesses intensity based on human observations. The video emphasizes the importance of being prepared for earthquakes, as they are unpredictable.

What causes the ground to shake during an earthquake?

• The movement of tectonic plates

• The eruption of a volcano

• The rotation of the Earth

• The gravitational pull of the moon

What is the role of a seismograph in measuring earthquakes?

• It predicts future earthquakes

• It measures the amplitude of seismic waves

• It prevents earthquakes from occurring

• It calculates the distance to the epicenter

Which scale is based on human observations to estimate earthquake intensity?

• Richter scale

• Mercalli scale

• Seismic scale

• Amplitude scale

What should you do during an earthquake to stay safe?

• Stay in bed and cover yourself with a blanket

• Drop, cover your face, and hold on

• Stand under a doorway

• Run outside immediately

Why is it difficult to predict earthquakes accurately?

• Because the technology is too expensive

• Because they occur too frequently

• Because the exact conditions leading to an earthquake are not fully understood

• Because they only happen in remote areas