NGSS.4-ESS2-1

_____________ makes rocks smaller but does not change the rock.

• humus
• soil
• physical weathering
• chemical weathering

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NGSS.4-ESS2-1

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

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NGSS.4-ESS2-1

Weathering can be created by

• wind
• ice
• water
• all of the above

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NGSS.4-ESS2-1

Which of these is an example of erosion

• Light Shinning onto a mountain
• Rain breaking down rock 
• Wind blowing away sediment
• All of the above

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NGSS.4-ESS2-1

Salt water eats away at rock

• Mechanical Weathering
• Chemical Weathering
• Erosion
• Deposition

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NGSS.4-ESS2-1

As you were climbing a mountain, you noticed that rocks were crumbling below your feet and moving down the mountain. What 2 processes did you observe?

• Weathering and erosion
• Erosion and deposition
• Abrasion and chemical weathering
• Abrasion and ice wedging

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NGSS.4-ESS2-1

How are canyons formed?

• Glaciers moving down mountain
• Wind blows
• Water seeping into cracks
• Flowing rivers erode the walls

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NGSS.4-ESS2-1

What causes rocks to break down?

• Weathering
• Erosion
• Deposition
• Cementation

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NGSS.4-ESS2-1

How was this canyon most likely formed?

• Water eroded the sandstone away from the canyon walls

• Glaciers eroded the canyon as the ice melted

• Ice wedged into the cracks in the rock and weathered the walls

• Wind blew large rocks that smashed into the walls

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NGSS.4-ESS2-1

How is the river changing the valley over time?

• The river is drying up, exposing rocks

• The river becomes more narrow

• The river freezes

• The river is widening, covering more land and rocks.

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NGSS.4-ESS2-1