Earth's Surface Changes and Natural Events

The video explains how Earth's surface changes, focusing on quick changes caused by volcanoes, earthquakes, and landslides. It highlights the 1980 eruption of Mount St. Helens, which dramatically altered the landscape. The video also discusses how earthquakes create cracks and landslides reshape the land, often triggered by heavy rainfall. These natural events can transform Earth's surface in minutes or seconds.

What is the main difference between slow and quick changes to Earth's surface?

• Slow changes occur over centuries, quick changes occur in minutes or seconds.

• Slow changes occur in seconds, quick changes occur over days.

• Slow changes occur in minutes, quick changes occur over centuries.

• Slow changes occur over days, quick changes occur over years.

What is a key characteristic of an active volcano?

• It erupts only once in its lifetime.

• It never erupts.

• It has erupted in the last 10,000 years.

• It erupts every year.

What was a significant result of the Mount St. Helens eruption?

• The eruption had no impact on the landscape.

• A large landslide reshaped the mountain.

• The mountain's shape remained unchanged.

• The mountain became taller.

How do lava flows from volcanic eruptions affect Earth's surface?

• They cause earthquakes.

• They create new rock layers.

• They prevent landslides.

• They remove existing rock layers.

What causes the ground to shake during an earthquake?

• Heavy rainfall.

• Volcanic eruptions.

• Large parts of Earth's surface slipping past each other.

• Strong winds.

What can earthquakes create on Earth's surface?

• New mountains.

• Deserts.

• Cracks in the surface.

• Lakes.

What natural event can cause landslides besides earthquakes?

• Droughts.

• Heavy rainfall.

• Sunny weather.

• Snowfall.

What happens to the slope after a landslide?

• It remains unchanged.

• It looks scooped out.

• It becomes steeper.

• It becomes a lake.

Where does the material from a landslide typically end up?

• At the bottom of the slope.

• In the sky.

• In the ocean.

• At the top of the slope.

What is a common result of landslides on the landscape?

• Creation of new rivers.

• Destruction of oceans.

• Formation of new mountains.

• Reshaping of the land.