Weathering an erosion

Do you think our planet will stay the same in the future? Why or why not?

• • Yes, I think Earth will stay the same.

• • No, I think Earth will change slowly over time.

• • I’m not sure, but I think people can help protect the Earth.

• • Earth is always changing, and we should learn how to adapt.

What is weathering?

• Movement of soil by wind or water

• Breaking down of rocks into smaller pieces

• Growing plants on soil

• Freezing water into ice

Which of these is an example of mechanical weathering?

• Rust forming on metal

• Water freezing in cracks and breaking rocks

• Acid rain dissolving limestone

• Roots releasing chemicals

Chemical weathering means:

• The wind blowing sand

• Ice breaking stones

• Plants growing in cracks

• Water and chemicals changing rock composition

Which is a consequence of erosion?

• Soil and sediment being carried to rivers or oceans

• Rocks turning into crystals

• Soil staying in place

• Volcanoes erupting

Erosion moves weathered materials from one place to another.

• True

• False

Freezing water in rock cracks is an example of chemical weathering.

• True

• False

Wind erosion can shape rocks and create sand dunes.

• True

• False

What causes erosion?

• Rocks being pushed underground

• Rainwater, wind, and ice carrying soil away

• Plant roots breaking rocks

• The sun heating the earth

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