Quiz about Classifying Rocks

Question 1

True or False?  Rocks can be classified solely based on their color.

Accepted Answer

False

Answer

True

Question 2

This rock was another type of rock that was heated and compressed over time. What type of rock is this?

Accepted Answer

Metamorphic

Answer

Sedimentary

Answer

Igneous

Question 3

This rock was formed by smaller pieces of rock that settled at the bottom of a lake millions of years ago. What type of rock is this?

Accepted Answer

Sedimentary

Answer

Igneous

Answer

Metamorphic

Question 4

This rock started as lava that cooled and then was heated and compressed over time. What type of rock is this?

Accepted Answer

Metamorphic

Answer

Sedimentar

Answer

Igneous

Question 5

This rock used to be the bottom of an ocean millions of years ago. What type of rock is this?

Accepted Answer

Sedimentary

Answer

Igneous

Answer

Metamorphic

Question 6

This rock was formed by lots of fossils that settled on top of each other over time. What type of rock is this?

Accepted Answer

Sedimentary

Answer

Igneous

Answer

Metamorphic

Question 7

This rock started as molten magma. What type of rock is this?

Accepted Answer

Igneous

Answer

Sedimentary

Answer

Metamorphic

Question 8

Wind and water have eroded this rock to show the layers of sediment that were laid down millions of years ago. What type of rock is this?

Accepted Answer

Sedimentary

Answer

Igneous

Answer

Metamorphic

Question 9

After lots of time, pressure, and heat, you get this kind of rock. What type of rock is this?

Accepted Answer

Metamorphic

Answer

Sedimentary

Answer

Igneous

Question 10

This rock was found near the mouth of a volcano. What type of rock is this?

Accepted Answer

Igneous

Answer

Sedimentary

Answer

Metamorphic

Question 11

This rock is made from tiny pieces of other rocks that settled to the bottom of a valley millions of years ago. What type of rock is this?

Accepted Answer

Sedimentary

Answer

Igneous

Answer

Metamorphic

Question 12

This started as a rock that was formed near a volcano. It was buried deeper in the ground, heated, and compressed over a long time. What type of rock is this?

Accepted Answer

Metamorphic

Answer

Sedimentary

Answer

Igneous

Question 13

This rock cooled on the outside of a volcano and contained air bubbles when it was forming. What type of rock is this?

Accepted Answer

Igneous

Answer

Sedimentary

Answer

Metamorphic

Question 14

Igneous rock forms in regions where--

Accepted Answer

A rock is heated to melting point then cooled to a solid.

Answer

Metallic minerals are put under extreme pressure.

Answer

A river deposits sand and mud over a long time.

Answer

Evidence of organisms is becoming fossilized.

Question 15

Sedimentary rocks will most likely form an environment where--

Accepted Answer

Particles of rocks are accumulating.

Answer

Two land masses are colliding.

Answer

Liquid rock is hardening into a solid.

Answer

Minerals are being created under pressure.

Question 16

Scientists classify igneous, metamorphic, and sedimentary rocks based on their--

Accepted Answer

formation

Answer

shape

Answer

color

Answer

usefulness

Question 17

True or False?  Rocks must contain at least two minerals in order to form.

Accepted Answer

False

Answer

True

Question 18

How many rock forming minerals are responsible for most of the rocks of Earth's crust?

Accepted Answer

20

Answer

10

Answer

100

Answer

too many to count

Question 19

Select the fact that is true about granite.

Accepted Answer

Granite is generally a light-colored rock.

Answer

Granite is generally a dark-colored rock.

Answer

Granite is generally low in silica content.

Answer

Granite has no silica content,

Question 20

This picture shows a rock with what type of grain shape?

Accepted Answer

rounded grains

Answer

jagged grains

Question 21

This picture shows a rock with what type of grain shape?

Accepted Answer

jagged grain

Answer

rounded grain

Question 22

What type of grain pattern is illustrated in this picture?

Accepted Answer

banded

Answer

nonbanded

Question 23

What type of grain pattern is illustrated in this picture?

Accepted Answer

nonbanded

Answer

banded

Question 24

Which of the following descriptions is used for grain size?

Accepted Answer

fine grain

Answer

large grain

Answer

tiny grain

Answer

jagged grain

Classifying Rocks

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