Science: Weathering and Erosion Flashcards

Weathering is when rocks are broken down (chemically or mechanically) and erosion is when sediment is carried away.

Deposition is when the sediment settles out of the water, wind, or ice that is carrying it.

The material moved by erosion.

<p>The roots of plants help hold the soil together so that it does not erode away.</p> Signup and view all the answers

<p>Erosion is the process that carries sediment to another location by water, wind, ice, or gravity. Water is the major agent.</p> Signup and view all the answers

<p>Water.</p> Signup and view all the answers

<p>Weathering.</p> Signup and view all the answers

<p>Broken down rock and other materials on Earth's surface.</p> Signup and view all the answers

<p>Humus is a dark colored substance formed from the decay of plant and animal materials. Loam is made of about equal parts of sand, silt, and clay.</p> Signup and view all the answers

<p>In the 1930's, the southern plains states experienced a long period of drought, which caused many large dust storms.</p> Signup and view all the answers

<p>Over-plowing exposed the topsoil during times of drought, causing it to blow away.</p> Signup and view all the answers

<p>Chemical weathering breaks down rock through chemical changes. Mechanical weathering is when rocks are physically broken down into smaller pieces.</p> Signup and view all the answers

<p>Abrasion, plant growth, freezing and thawing.</p> Signup and view all the answers

<p>Oxygen, carbon dioxide, water (most important).</p> Signup and view all the answers

<p>A V-shaped valley is formed by a river, and a U-shaped valley is formed by a glacier.</p> Signup and view all the answers

<p>Created by the deposition of sediment by waves.</p> Signup and view all the answers

<p>Through the process of impact and abrasion.</p> Signup and view all the answers

<p>Any large mass of ice that moves slowly over land.</p> Signup and view all the answers

<p>Plucking - rocks are picked (plucked) up by the glacier. Abrasion is when the glacier drags rocks across the land and leaves scratches and gouges.</p> Signup and view all the answers

<p>A land area from which a river and its tributaries collect their water.</p> Signup and view all the answers

<p>When oxygen combines with iron in the presence of water and causes rocks to rust.</p> Signup and view all the answers

<p>Makes rock soft and crumbly and gives it a reddish brown color.</p> Signup and view all the answers

<p>Organisms that break remains of dead things into smaller pieces; they digest them with chemicals.</p> Signup and view all the answers

<p>Fungi, protists, bacteria, worms.</p> Signup and view all the answers

<p>A stream that flows into a larger stream.</p> Signup and view all the answers

<p>Rills, gullies, stream, river.</p> Signup and view all the answers

<p>Several processes that move sediment downhill.</p> Signup and view all the answers

<p>Landslide, mudflow, creep, slump.</p> Signup and view all the answers

<p>Rock full of tiny connected air pockets.</p> Signup and view all the answers

<p>Because water seeps through the air pockets and removes the dissolved material formed.</p> Signup and view all the answers

<p>Hot, wet climates.</p> Signup and view all the answers

<p>Chemical reactions occur at a faster speed there.</p> Signup and view all the answers