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Landslides Practice Test

Chapter 5 • Fast Changes on Earth • Lesson 1

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How do landslides change the land quickly?

1. _______________ is a _______________ that acts on all objects.

💡 Think about what keeps you on the ground...

✅ Gravity is a pulling force that acts on all objects.

2. _______________ pulls materials such as weathered rocks and soil from a _______________ to a _______________.

💡 Materials go from up high to down low...

✅ Gravity pulls materials from a high place to a low place.

3. A _______________ occurs when a large amount of loose rock and soil _______________.

💡 The "land" does this very fast down a hill...

✅ A landslide occurs when loose rock and soil moves rapidly.

4. A landslide is sometimes caused by things that quickly shift the land such as an _______________, or rocks that _______________.

💡 The ground shakes... and water in rocks expands when cold...

✅ Caused by an earthquake, or rocks that freeze and thaw.

5. A landslide can carry _______________ with it and also cause _______________.

💡 Think big — houses, vehicles, nature...

✅ Carries trees, homes and cars and causes property damage.

How do floods change the land quickly?

6. _______________ can also cause the land to change _______________.

💡 Too much water, too fast...

✅ Floods can cause the land to change quickly.

7. When the ground is not able to hold any more water, it runs on top of _______________ and may flow into _______________.

💡 Water that can't soak in has to go somewhere...

✅ Runs on top of the land and flows into streams and rivers.

8. A _______________ occurs when the banks of a _______________ or _______________ overflow.

💡 Water goes over the edges of waterways...

✅ A flood occurs when the banks of a stream or river overflow.

9. Flood waters _______________ quickly.

💡 Water wears away the ground...

✅ Flood waters erode soil quickly.

10. Some floodwaters are so strong that they may wash away _______________ that supports bridges and roads, causing them to _______________.

💡 The ground under roads gets washed out...

✅ Wash away soil, causing them to collapse.

11. When land becomes full of water, it may change into a river of _______________, called a _______________.

💡 Wet soil on a slope becomes a river of...

✅ A river of mud and rock, called a mudslide.

12. Materials left behind by a mudslide may keep _______________ from going down as quickly.

💡 The debris blocks the water from draining...

✅ Keeps floodwaters from going down as quickly.

What are some safety tips for landslides and floods?

13. During heavy rains, listen to the _______________ for warnings.

💡 An electronic device that broadcasts news...

✅ Listen to the radio for warnings.

14. Watch and listen for _______________, new cracks in the _______________, and tilting _______________.

💡 Signs that the ground is moving...

✅ Watch for unusual sounds, cracks in ground or walls, and tilting trees or telephone poles.

15. If you are near a landslide, _______________.

💡 Get out of the way!

✅ Move away from its path.

16. A _______________ means that flooding is possible.

💡 Not a warning yet — just watching for it...

✅ A flood watch means flooding is possible.

17. A _______________ means that a flood is occurring or will occur soon.

💡 More serious than a watch — it's happening!

✅ A flood warning means a flood is occurring or will occur soon.

18. If there is a warning for your area, _______________.

💡 Go UP, away from the water...

✅ Move to higher ground.

19. If caught in a flood, do not _______________.

💡 Moving water is much stronger than you think...

✅ Do not walk in moving water.

Summarize the Main Idea

20. What do landslides and floods have in common?

💡 Think about FAST changes vs slow changes...

✅ Landslides and floods both change the Earth's surface very quickly.