Earth History Inv. 2 Weathering & Erosion

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

• keeps the rocks in place.
• makes the rocks last longer.
• expands cracks and breaks rocks.
• causes rocks to fall in landslides.

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The process that breaks down rocks and other materials on Earth's surface is called

• Weathering
• Erosion
• Deposition
• Decomposition

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Over long periods of time, deposition may change the Earth’s surface by _____.

• forming new land features.
• breaking down large rocks into smaller ones.
• washing away beaches.
• moving topsoil.

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What is the process that picks up and moves weathered rocks?

• Deposition
• Landslide
• Weathering
• Erosion

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Deposition changes the Earth’s surface because bits of broken rock and soil _____.

• stop rivers from flowing.
• make rich farmlands.
• are dropped in new places.
• move very slowly.

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How do plants weather rocks?

• During photosynthesis
• When roots grow into cracks of rocks and expand the rock breaks.
• When the plant moves water from the roots to the leaves, the rock breaks.
• Plants don't weather rocks.

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These rocks were made smooth by wind blowing smaller rock particles across their surface.  This is an example of:

• ice wedging
• chemical weathering
• acid rain
• abrasion

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Weeds growing into the cracks in a sidewalk and the sidewalk begins to crumble is an example of:

• physical weathering

• chemical weathering

Rocks along a riverbed that are smoothed from continuously moving water and sediment rubbing against them is an example of:

• physical weathering

• chemical weathering

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Low areas where eroded material is often deposited.

• basin

• bin

• deposition

• rock fall

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