Earth Lesson 8

What is a lahar?

• A volcano erupting

• Magma that has reached the Earth's surface

• A mudflow made of ash and debris from a volcano

• a character from a Dr. Seuss book

Tags

NGSS.MS-ESS3-2

How does the slope of a volcano affect the lahar?

• A volcano with a steep slope will cause the lahar to flow faster than a shallow slope

• A volcano with a shallow slope will cause the lahar to flow faster than a steep slope

• The slope of a volcano does not have an effect on the lahar

What is a cold lahar?

• A lahar that happens near an active volcano

• A lahar that happens in the winter time

• A lahar that started to occur, but then stopped

• A lahar that is triggered by rain

How does a light rain over a long period of time affect a lahar compared to a heavy rain over a short period of time?

• Light rain over a long period of time will cause a very severe lahar because a lot of water is building up

• Heavy rain over a short period of time will not cause a lahar because not enough rain will build up

• Heavy rain over a short period of time will cause a severe lahar because it will saturate loose soil

• Light rain over a long period of time will cause a series of mini lahars to occur frequently

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-2

Where are volcanoes located that seem to experience the most lahars?

• In hot environments near rivers

• In dry environments like the desert

• In cold environments that are prone to rain

• In environments that experience extreme temperature changes

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-2

What is it called when silt in an area is deposited from wind blown dust?

• Suspended Load

• Esker

• Loess

• Moraine

What are the mounds of sand called that are formed from wind, usually near beaches?

• Sand Dunes

• Loess

• Sinkholes

• Lahar

What is the sediment that is carried by a water flow which never complete settles called?

• Moraine

• Glacier

• Groundwater

• Suspended Load

This type of erosion can form a loess and and sand dune.

• Wind Erosion

• Glacial Erosion

• Water Erosion

This type of erosion can form deep valleys, canyons, and sinkholes.

• Wind Erosion

• Glacial Erosion

• Water Erosion

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-2