What is an Earthquake?

Earthquakes are sudden, violent movements of the Earth's crust caused by tectonic plate shifts. They occur at fault lines, with the focus being the point of pressure release and the epicenter directly above it. Seismic waves from earthquakes are measured using seismometers and the Richter scale. Severe earthquakes can devastate cities and trigger secondary effects like tsunamis. Despite their impact, predicting earthquakes remains a challenge.

What is the term for the point inside the Earth's crust where pressure is released during an earthquake?

• Seismic wave

• Focus

• Epicenter

• Fault line

Which scale is used to measure the magnitude of an earthquake?

• Richter scale

• Fujita scale

• Mercalli scale

• Beaufort scale

What can be a consequence of a severe earthquake?

• Hurricanes

• Increased rainfall

• Tsunamis

• Volcanic eruptions

What is a common occurrence after the initial earthquake?

• Aftershocks

• Tornadoes

• Floods

• Droughts

Why is it difficult to predict earthquakes?

• They occur only in remote areas

• They are caused by human activities

• They are a new phenomenon

• There is no reliable method to predict them