Earth's Dynamic Surface Changes Over Time

The video explains how the Earth's surface is constantly changing, with some changes occurring gradually over thousands of years, while others happen rapidly. Rapid changes include earthquakes, volcanic eruptions, and landslides, which can alter landscapes in minutes. Earthquakes can cause cracks and destruction on land and ocean floors, sometimes leading to tsunamis. Volcanic eruptions release lava and gases, reshaping the surface. Landslides involve large soil movements, often triggered by earthquakes or eruptions. A mnemonic device is introduced to help remember these rapid changes.

What are some examples of features formed by gradual changes to the Earth's surface?

• Deserts and plains

• Rivers and lakes

• Mountains and hills

• Canyons and caves

Which natural event can cause rapid changes to the Earth's surface by creating cracks and destruction?

• Volcanic eruptions

• Earthquakes

• Tsunamis

• Landslides

What can underwater earthquakes generate that leads to massive destruction?

• Floods

• Tsunamis

• Tornadoes

• Hurricanes

Where can volcanoes be found?

• Only on land

• Only underwater

• Both on land and underwater

• Only in mountainous regions

What significant event occurred at Mount St. Helens in 1980?

• A tsunami

• A massive landslide

• A volcanic eruption

• A major earthquake

What triggers landslides that cause rapid changes to the Earth's surface?

• Heavy rainfall

• Earthquakes and volcanic eruptions

• Strong winds

• Tidal waves

What is a common result of landslides?

• Creation of new rivers

• Rapid movement of large amounts of soil

• Formation of new mountains

• Expansion of deserts

Which of the following is NOT a cause of rapid changes to the Earth's surface?

• Landslides

• Erosion by wind

• Earthquakes

• Volcanic eruptions

What memory device can help remember the causes of rapid changes to the Earth's surface?

• Swift trolls

• Fast fairies

• Quick giants

• Rapid elves