Sedimentary Rock and Fossil Fuels

The model below shows layers of sediment on the floor of an ocean. Which of the following best explains how these layers can become rock over many years?

• Sand in the sediment melts and turns into rock

• The weight of the water compacts the sediment into rock

• Changing water temperatures turn sand in the sediment into rock

• Pollution caused by humans turns the sediment into rock

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Where does the sediment that forms sedimentary rocks come from?

• Sediments are formed by the cooling of magma

• Sediments are formed from the bones of dead fish

• Sediments are formed from decaying plant and animal matter

• Sediments are formed when rocks are broken down by weathering

Answer explanation

Always remember!! The first step of creating sedimentary rocks is the breaking down of bigger rocks! 😎

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The main processes for creating sedimentary rocks is by adding (a)   and pressure.

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How could you conserve (save) MORE fossil fuels?

• Take car trips using a lot of gasoline.

• Run the gas heater when no one is home.

• Take less car trips by walking and riding bikes to reduce use of fossil fuels. 

• Take longer showers.

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What process needs to occur over many years for sedimentary rocks to be completely formed?

• Evaporation and condensation from the water cycle

• Weathering of rock to break it apart

• Compaction and cementation to make sedimentary rock

• Heat and pressure to change the dead plants into coal

Oil formation starts when organisms in the ocean die and then –

• get eaten by larger organisms that receive their energy

• are carried by currents all over the planet

• decay completely so that their matter is recycled.

• settle to the bottom and are buried in sediments

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Fossil fuels were formed from ____.

• the remains of once living organisms.

• the earth.

• solids, liquids, and gases, made millions of years ago.

• sun and water.

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How are Sedimentary Rocks formed?

• Cooling and Hardening
• Heat and Pressure
• Compacting and Cementing
• Melting

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What must be present for Fossil Fuels to form?

• Bones and Sediment
• Dead Organisms and Layers of Sediment
• Dead Organisms, Layers of Sediment, and Heat & Pressure over time
• Bones, Layers of Sediment, and Heat & Pressure over time

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Which layer formed first?

• Rock Layer W
• Rock Layer X
• Rock Layer Y
• Rock Layer Z

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