Question 1

How does igneous rock form?

Accepted Answer

Cooling and solidification of magma

Answer

Cementation of mineral or organic particles on the floor of oceans

Answer

Accumulation or deposition of small particles

Answer

Transformation of rock due to heat, pressure or chemical conditions

Question 2

Which of the following is NOT TRUE about plutonic rocks?

Accepted Answer

They are formed when lava cools and solidifies on the earth's surface

Answer

They have crystals that are large enough to see with the naked eye

Answer

The texture of these rocks is typically described as phaneritic

Answer

They solidify and cool slowly.

Question 3

Which of the following describes the relationship between rate of cooling and texture?

Accepted Answer

Faster cooling yields to finer grain texture

Answer

Plutonic rocks cooled faster than volcanic rock.

Answer

Faster cooling results in crystals that can be easily seen

Answer

Faster cooling yields to coarse-grain structure.

Question 4

How will you compare volcanic rocks and plutonic rocks based on temperature?

Accepted Answer

Volcanic rocks are exposed to lower temperature

Answer

The temperature difference is not significant.

Answer

Plutonic rocks are exposed to lower temperature.

Answer

Volcanic and plutonic rocks are exposed to the same temperature.

Question 5

Granite is an example of an intrusive felsic rock. Rhyolite, on the other hand, is an extrusive felsic rock. How will you compare the two rocks?

Accepted Answer

They contain Feldspar and Quartz

Answer

Granite has more Magnesium and Iron than Rhyolite

Answer

Rhyolite has more Magnesium and Iron than Granite

Answer

They are both formed when magma cools and solidifies below the earth'ssurface.

Question 6

When the stress is released, rocks go back to their original shape. What type of deformation is this called?

Accepted Answer

Elastic

Answer

Ductile

Answer

Brittle

Answer

Plastic

Question 7

Which of the following refers to the technical term for pressure applied to rocks?

Accepted Answer

Fold

Answer

Stress

Answer

Deformation

Answer

Strain

Question 8

What kind of fold is shown?

Accepted Answer

Anticline

Answer

Reverse

Answer

Normal

Answer

Syncline

Question 9

When does a fault form?

Accepted Answer

When compression stress overcomes the internal strength of rock

Answer

When plates spread apart

Answer

When plates slide past one another

Answer

When the rocks’ internal strength is greater than the compression stress

Question 10

How do anticline and syncline fold differ?

Accepted Answer

Anticline is upfold while syncline is downfold of rock layers

Answer

Anticline is downfold while syncline is upfold of rock layers

Answer

Anticline is thicker than syncline.

Answer

Anticline is thinner than syncline.

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