Topic 7- TEST Review

What type of rock is shown in the picture? Select which option describes how it was formed. (multiple answers)

• sedimentary

• igneous intrusive

• You can see bits of shell and sediment that have bonded together.

• The rock had to undergo melting and crystallization to form.

• The rock formed from being compacted and cemented for many years beneath Earth's surface.

Which of the following options is NOT a part of the processes that a rock undergoes to become a sedimentary rock?

• weathering & erosion

• deposition

• high heat

• transportation

• compaction and cementation

Which layer of Earth is the thickest?

• mantle
• outer core

• crust

• inner core

T/F (type "t" for true or "f" for false): The Earth's layers in order from the inner most layer to the outermost layer would be as follows- crust, mantle, inner core, outer core.

Which of Earth's layers is the thinnest?

• mantle

• inner core

• crust

• outer core

Select all options that are true about the inner core of
Earth. (multiple answers)

• it is liquid

• it is solid

• it is the hottest layer

• it is under the least pressure

• it is under the most pressure

Convection occurs in the mantle, which can show rock rising and sinking in convection currents. Which of the following processes is responsible for causing the rock to rise?

• rock is heated

• rock rapidly cools

• rock increases in density

• rock undergoes intense pressure

Answer explanation

If rock rapidly cools, it would sink. If rock increases in density, it would sink. If rock undergoes intense pressure it would begin to compact/sink.

Which options are true of the outer core? (multiple answers)

• it is solid

• it is liquid

• it causes Earth's magnetic field

• it is under the most pressure

• it is the hottest layer

Do rocks always follow the same steps when they go through the rocky cycle? (essay on test)

• Yes; there is only one path in the rock cycle- igneous, sedimentary, metamorphic.

• Yes; rocks cannot become other types of rocks, so they must follow the same path.

• No; rocks follow the rock cycle path- igneous, sedimentary, metamorphic.

• No; rocks don't follow the same steps like a sedimentary rock can become either a metamorphic or igneous rock.

Answer explanation

Sedimentary rocks can become metamorphic under high heat and pressure or an igneous rock from melting and cooling. An igneous rock can become a metamorphic rock from high heat and pressure or a sedimentary rock from weathering and erosion, transportation, deposition, compaction, and cementation. A metamorphic rock can become an igneous rock from melting and cooling or sedimentary rock from weathering and erosion, transportation, deposition, compaction, and cementation.

Which option can occur after a rock is weathered?

• forms a metamorphic rock

• melts and forms an igneous rock

• sediment can form magma

• it gets compacted and forms sedimentary rock