Explain how the Colorado River formed the Grand Canyon.

The Colorado River eroded the land over millions of years through downcutting and carrying away small pieces of rock and earth.

What are dunes made of?

Tiny pieces of rock called sand.

Wind picks up sand and drops the bigger pieces. These pieces stick together, and more sand sticks to them, causing a dune to grow.

4thScience45 min

I can describe how weathering and erosion change the Earth’s surface.

6 min

Water Made the Grand Canyon! | SciShow Kids

SciShow Kids

9 min

Key concepts students will learn:

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The Grand Canyon was formed by the Colorado River over millions of years through a process called downcutting and erosion.
•
Dunes are large piles of sand that are built by wind in deserts and on beaches.
•
Natural stone arches are formed when water seeps into stone, freezes, and cracks it, then wind and water erode the rock to create an arch shape.

14 min

10 questions • Multiple choice & Short answer

5 min

“Name one way that water changes the Earth’s surface and one way that wind changes the Earth's surface.”

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