Quick Changes to Earth's Surface

What can cause Earth's surface to change very quickly?

• Volcanoes

• Plant growth

• Farming activities

• Building construction

What is an active volcano?

• A volcano that is covered in snow

• A volcano that has never erupted

• A volcano that is under water

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

What happened during the Mount St. Helens eruption?

• A landslide occurred

• It turned into a lake

• It erupted quietly

• It became taller

What does the eruption of a volcano release?

• Water

• Rocks, ash, gas, and steam

• Fish

• Leaves

What does lava form when it cools and hardens?

• Water pools

• New rock layer

• Trees

• Sand

What natural event can create cracks in Earth's surface?

• Sunlight

• Wind

• Earthquake

• Snowfall

What is the result of the earth shaking during an earthquake?

• It attracts wildlife

• It creates cracks in the surface

• It causes buildings to rise

• It becomes cooler

How do landslides change the landscape?

• They flatten the entire land

• They create new mountains

• They reshape the land

• They cause rivers to form

What can trigger a landslide?

• Leaf fall

• Animal movements

• Loud noises

• Heavy rainfall

What happens at the bottom of a slope after a landslide?

• It is covered in ice

• A pile of rocks and soil gathers

• A lake forms

• It becomes smoother