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A World of Change
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Vocabulary: (adj.) not seen or noticed
Unnoticed
Vocabulary: (n.) a sudden serious and dangerous event that needs immediate action
Emergency
What are scientists trying to do to help with natural changes?
They are trying to predict when these changes might happen.
How does a landslide happen?
When heavy rains wash away dirt on a mountain.
What is another example of a fast natural change? (no volcanoes)
A landslide
For who can a volcano eruption be dangerous?
People who live near the volcano.
What do you call the hot melted rock from a volcano?
Magma
Why does this happen?
The pressure builds up under the Earth's surface.
What is this called?
Volcanic Eruption
Which natural changes are unexpected?
Fast and Powerful natural changes.
True or False: Fast natural changes are more dangerous than slow natural changes?
True
What happens when you plant trees and bushes?
The roots grow into the ground and keep the dirt in place.
How can you prevent erosion?
You can plant bushes and trees.
What can erosion cause?
An area to get smaller. / Reduces the amount of food people can produce.
Strong natural forces, such as large rivers, carry dirt and rocks away.
Erosion
What does deposition change?
The landscape.
Wind and water carries dirt or rocks from one place to another.
Deposition
What happens to the soil when weathering occurs?
The rocks break into smaller pieces and become soil.
Rain, snow, sun, and wind break down rocks.
Weathering
Name two types of changes on the Earth.
Slow and Steady/Fast and Powerful
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