Earth's Changes: Weathering and Erosion

The video explains how changes on Earth can be quick or slow, focusing on weathering and erosion caused by wind and water. It discusses the concept of time in geological terms, using examples like the Grand Canyon and Niagara Falls to illustrate how these processes shape the Earth over millions of years. The video also highlights the differences in landforms created by wind and water erosion.

What is an example of a quick change mentioned in the video?

• A boy's hair becoming shorter

• A boy's hair growing

• A mountain forming

• A tree growing

What can cause slow changes to the Earth's surface?

• Human activities

• Volcanic eruptions

• Earthquakes

• Wind and water

What is the process called when wind or water breaks apart rocks?

• Weathering

• Sedimentation

• Deposition

• Erosion

What happens during erosion?

• Small bits of rock or soil are moved from one place to another

• Rocks are broken apart

• Rocks are formed

• Water evaporates

How do sand dunes form?

• By water carrying sand

• By wind carrying sand and depositing it in another place

• By volcanic activity

• By human construction

What natural feature was formed by weathering and erosion over millions of years?

• Mount Everest

• The Sahara Desert

• The Grand Canyon

• The Amazon Rainforest

How tall is Niagara Falls?

• 150 feet

• 170 feet

• 100 feet

• 200 feet

What caused the step at Niagara Falls to become taller?

• Earthquakes

• Volcanic eruptions

• The force of falling water hitting rock

• Human construction

What is an example of wind eroding sandstone?

• A wet surface

• A rough surface

• A smooth surface

• A cracked surface

What process can create long steps and grooves in sandstone?

• Volcanic activity

• Wind weathering

• Human activities

• Water erosion