Unit 6: Earths Layers and Rock Cycle Review

A student wanted to make a model of the Earth. The student decided to cut a giant Styrofoam

ball in half and paint the layers on it to show their thickness.

Which model below best represents the layers of the Earth?

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A student is building a model of the layers of the Earth. Which material would best represent the

crust?

• Grouping of magnetic balls

• Styrofoam packing pellets

• Bag of shredded paper

• Thin layer of plaster

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A student made lemon drop candy by melting sugar, water, and lemon flavoring in a sauce pan

until the mixture was at a very high temperature. Next, the student poured the clear yellow

mixture onto a baking sheet until it was cool.

The process of making lemon drop candy is most like the formation of what type of rock?

• Igneous

• Metamorphic

• Sedimentary

• Conglomerate

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A rock sitting on the surface of the Earth is pushed down deep into the Earth over time and is

exposed to tremendous heat and pressure over time. Although the rock does not melt, it does

change into a new type of rock.

How would the new rock be classified?

• Igneous

• Magma

• Metamorphic

• Sedimentary

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A student made peanut butter bars by pressing a layer of graham cracker crumbs into a baking

pan. Next, the student added a layer of a peanut butter mixture and then added a layer of

crushed peanuts. Lastly, the student added a layer of chocolate frosting.

The process of making peanut butter bars is most like the formation of what type of rock?

• Igneous

• Metamorphic

• Sedimentary

• Magma

Some students use an apple to represent the Earth. What is the best reason to use an apple for

this comparison?

• The skin of an apple is very thin, and the crust of the Earth is very thin.

• The flesh of an apple is made of the same material all the way through, and the interior of

  the Earth is the same all the way through.

• The seeds of the apple are very light in comparison to the rest of the apple, and the core of

  the Earth is also made of very light matter.

• The stem of the apple comes from the core and the North Pole comes from the Earth’s core.

According to the table above, which graph below best represents the

most abundant elements in the Earth’s crust?

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Which of the following process is most likely to occur at location Z?

• Solid rock is weathered

• Solid rock melts

• Rocks become uplifted

• Magma cools and hardens

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Obsidian, a shiny naturally made volcanic glass, is formed when lava rapidly cools without much

time for crystallization to occur. Early civilizations used obsidian to make arrowheads, knives,

spear heads, and other weapons and tools.

Based on the processes of its formation, obsidian is classified as –

• sedimentary rock

• fossilized rock

• metamorphic rock

• igneous rock

Marble, a common metamorphic rock is formed from the sedimentary rock limestone. Marble is

commonly used in architecture and sculpture. Many famous buildings are made of marble,

including the Washington Monument, the Taj Mahal, the Lincoln Memorial, and the Supreme

Court Building.

What processes occur in the formation of marble?

• Limestone is weathered, eroded, cemented and compacted.

• Limestone is buried deep in the Earth and undergoes long periods of extreme heat and

  pressure.

• Limestone is melted, cooled, and hardened.

• Limestone is washed away by running water, fossilized, and buried deep underground in

  layers.

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