Earth's Surface Changes and Events

The video explains how Earth's surface changes over time, with some changes occurring slowly over thousands of years and others happening quickly in minutes or seconds. It focuses on quick changes caused by natural events like volcanoes, earthquakes, and landslides. The eruption of Mount St. Helens is used as a case study to illustrate volcanic activity, while earthquakes and landslides are discussed in terms of their ability to reshape the land rapidly. The video concludes by encouraging viewers to think of other ways Earth's surface can change.

What are the two types of changes that can occur on Earth's surface?

• Natural and artificial changes

• Permanent and temporary changes

• Quick and slow changes

• Visible and invisible changes

What is considered an active volcano?

• A volcano that erupts every year

• A volcano that has erupted in the last 1,000 years

• A volcano that has erupted in the last 10,000 years

• A volcano that has never erupted

What caused the largest recorded landslide on Mount St. Helens?

• A volcanic eruption

• An earthquake

• Heavy rainfall

• A tsunami

What was the speed of the rocks, ash, gas, and steam during the Mount St. Helens eruption?

• 100 miles per hour

• 200 miles per hour

• 300 miles per hour or more

• 400 miles per hour

What is one of the effects of volcanic eruptions?

• Decrease in air pressure

• Increase in temperature

• Formation of new rivers

• Creation of new rock layers

What causes the ground to shake during an earthquake?

• Heavy rainfall

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

• Volcanic activity

• Wind erosion

What can earthquakes create on Earth's surface in just seconds?

• Mountains

• Rivers

• Cracks

• Lakes

What can heavy rainfall cause on sloped land?

• Tsunamis

• Landslides

• Volcanic eruptions

• Earthquakes

What happens to the slope after a landslide?

• It forms a new mountain

• It becomes flat

• It looks scooped out

• It becomes steeper

What is found at the bottom of the slope after a landslide?

• A lake

• A new forest

• A river

• A pile of rocks, soil, and plants