Exploring Earth's Changes

What can cause the Earth to change very quickly?

• Trees growing

• Forces like earthquakes

• Rivers flowing

• Mountains moving

What does wind do to the Earth over thousands of years?

• Cools it down

• Changes its shape

• Creates new oceans

• Makes it spin faster

What demonstrates Earth's slow changes in the video?

• A time-lapse of seasons

• A wind simulation

• A growing plant

• A model of a city

How long into the future did we travel to see Earth's changes?

• 1 million years

• 10 billion years

• 100 million years

• 1 billion years

What other force, besides wind, shapes the Earth?

• Water

• Sunlight

• Gravity

• Magnetic fields

What is one result of Earth's changes over millions of years?

• Sun getting closer to Earth

• The Earth becoming flat

• Disappearance of all rivers

• Creation of new mountains

What has carved out the Grand Canyon?

• Ocean waves

• The Colorado River

• Wind erosion

• A glacier

How does water affect the Earth's surface?

• By covering it with ice

• By drying it out

• By heating it up

• By carving and eroding it

How long has the Colorado River been carving the Grand Canyon?

• About 100 years

• About 10 billion years

• About 1,000 years

• About 2 to 6 million years

Why does the Grand Canyon have such a wide width?

• Due to animal activities

• It was always that wide

• Because of erosion and runoff

• Due to the river's width