Plants prevent soil erosion by-

holding dirt in place with their roots

releasing water into the atmosphere through transpiration

What happens when glaciers slowly move down a mountain?

the glaciers cause erosion by taking sediment and moving it somewhere else

the glaciers melt and form giant lakes

bits of rock, sand, and silt caused by the weathering of rocks

the process of rocks being broken down and carried away

decaying plant or animal material

This picture shows a large meteorite crater in a flat, arid part of northern Arizona. How will this crater most likely change over time?

It will become less deep as the rim erodes

It will get deeper as it fills with water

It will rise up like a volcanic crater

It will widen as it fills with lava

How does freezing water cause the weathering of rocks? The freezing water—

expands cracks and breaks rocks

causes rocks to fall in landslides

The diagrams show a natural process that weathers rock. Which statement best explains why this process results in weathering ?

the mass of water increases when it freezes

frozen water dissolves most types of rock

How does wind abrasion work?

Wind-blown sediment strikes a surface.

Sediment is blown off a surface from wind.

Wind blows large chunks of rock off a surface.

Sediment falls off of a surface on its own.

What is mechanical weathering?

Process through which rocks are physically broken into smaller pieces.

Rocks are broken down through chemical changes.

Rocks are worn away from acid in plant roots.

Rocks broken down by machinery.

Acid rain is an example of chemical weathering because

pollution gets dissolved in water and falls as rain dissolving rocks over time.

rain connected to dust falls and hits rocks so hard they break.

there is friction between rain and rocks.

A hot wet climate causes weathering to take place -

at the same rate as when the climate is dry and cool

Soil formation would take place most rapidly with weathering of -

limestone in a warm, wet climate

The most important factors in determining the rate of weathering are -

abrasion and acids from plant roots

What are the two ways that rocks are broken down into smaller pieces?

chemical weathering & physical weathering

chemical weathering & dissolving

physical weathering & precipitation

Why is planting trees on a muddy slope a good idea to prevent mudflows and landslides?

The trees keep the soil in place

What is mass movement?

When gravity causes material to move downhill

When rain causes the land to become very muddy and flow across the land

When rivers carry pieces of dirt and sediment

When gravity causes material to move uphill

Weathering, Erosion, Deposition 1st Period

Other Sciences

6th - 8th Grade

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Weathering, Erosion, Deposition 1st Period

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Flood water pounding against a canyon wall and wearing it down

Weathering

Erosion

Deposition

MULTIPLE CHOICE QUESTION

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Rain washing away soil from a hillside

Weathering

Erosion

Deposition

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Layers of sediment forming at the bottom of the ocean floor.

Weathering

Erosion

Deposition

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Waves dropping sand on the beach

Weathering

Erosion

Deposition

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Caves being formed by acid rain dissolving underground limestone

Weathering

Erosion

Deposition

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Deltas forming at the mouths of rivers

Weathering

Erosion

Deposition

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Water getting into cracks, freezing, and breaking the rocks or pavement apart

Weathering

Erosion

Deposition

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Weathering, Erosion, Deposition 1st Period

Flood water pounding against a canyon wall and wearing it down

Rain washing away soil from a hillside

Layers of sediment forming at the bottom of the ocean floor.

Waves dropping sand on the beach

Caves being formed by acid rain dissolving underground limestone

Deltas forming at the mouths of rivers

Water getting into cracks, freezing, and breaking the rocks or pavement apart

Wind blowing sand from one location to another

Wind blasting sand at rock and carving out arches

Glaciers scraping rocks across the earth’s surface

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