3rd Grade 2009-2010

Rocks and MineralsReview

I enjoyed learning about rocks and minerals.

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1. True2. False

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Sedimentary rocks like limestone, have…

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1. Visible layers 2. Small pieces of

other rocks3. May have fossils4. All of the above

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Soil and sand in a field blow away from strong winds. What could you do to slow down the erosion of the soil and sand?

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1. Add more dirt2. Plant grass in

the field3. Build a fence4. None of the

above

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There are four layers of soil.

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1. True2. False

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This layer of soil contains larger rocks and pebbles but no decayed plant and animal matter.

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33% 33%33%

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1. Solid rock2. Subsoil 3. Topsoil

This layer of soil contains small rocks, decayed plant and animal matter, and possibly living things.

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1. Solid rock2. Subsoil 3. Topsoil

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This layer is below the subsoil.

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33% 33%33%

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1. Solid rock2. Subsoil 3. Topsoil

Soil is mixture of tiny rock particles, ______, and decayed plant and animals material.

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1. Water2. Dirt 3. Minerals

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Two reasons soil can be different in two places are…

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1. Types of animals and plants that live there

2. Temperature3. Amount of rainfall4. All of the above

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Weathering is the process that causes rocks to crumble, crack, and break.

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1. True2. False

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Obsidian is a type of rock that forms when lava cools and hardens. Obsidian is what type of rock?

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1. Sedimentary2. Metamorphic3. Igneous

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Pressure, heat, and chemicals cause marble and granite to form. These changed rocks are __________rocks.

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1. Sedimentary2. Metamorphic3. Igneous

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There are six types of weathering. Which two are examples of weathering?

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1. Water & soil 2. Temperature

changes & ice3. Chemicals &

sunlight4. Plant roots &

leaves5. Wind & rocks1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

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Farmer Rich needs good topsoil to produce a great crop. Why would topsoil be the best choice?

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1. It is a renewable resource.

2. It has large rocks so water flows right through it.

3. It retains water and has essential minerals.

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Erosion of soil happens when soil is left unprotected.

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1. True2. False

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Soil is protected when there are no trees and land is left bare or empty.

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1. True2. False

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Who would want to reduce the amount of erosion that occurs?

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1. A doctor2. A farmer3. A lawyer

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