Name:___________________
Date/Period:________________
Rock Cycle Review
McDougal Littell Text Book
Work with your lab partner to answer the following
questions.
Most rocks are made of minerals.
Page 83 – Diagram Types of Igneous Rocks
1. Which rocks are extrusive igneous rocks, and where do
they come from?
Rhyolite, pumice, and basalt are extrusive igneous rocks, and
they form on Earth’s surface.
2. Which rocks are intrusive igneous rocks, and where do they
come from?
Granite and gabbro are intrusive igneous rocks, and they form
within Earth.
3. How are gabbro and basalt similar? How are they different?
Gabbro and basalt have the same composition, but gabbro is
an intrusive igneous rock and basalt is an extrusive igneous
rock.
4. Is the volcano in the illustration built of layers of intrusive
or extrusive igneous rock? Explain your answer.
The volcano is built of layers of extrusive igneous rock.
Molten rock reached Earth’s surface and then cooled, forming
the layers of the volcano.
Sedimentary Rock
Page 92 – Photographs 1, 2, and 3.
1. In the three photographs, what overall change do you see in
the rock?
The shells become harder to see.
2. What caused the change?
The minerals in the shells dissolved and re-formed to produce
limestone.
Page 93 – Picture of Mono Lake, California
1. How are the origins of rock salt and some limestone
similar?
Both can dissolve in water, be carried to a new location, and
re-form as the water evaporates.
Page 98 – Metamorphic Rock
What effect can an increase in temperature have on a solid?
What effect can increased pressure have?
Increased temperature can make a solid more pliable (flexible)
and increased pressure can compact a solid.
Page 99 - Diagram Metamorphic Changes
1. In each pair of diagrams, how does the first diagram differ
from the second?
The first diagram shows an area of rock before it undergoes
metamorphism. The second diagram shows the same area of
rock after it has been changed.
2. What causes the metamorphic changes in rock over the
large area shown in the top diagrams?
Heat and pressure.
3. In the bottom diagrams, how does the invading magma
affect the rock around it?
It bakes the surrounding rock and causes metamorphic
changes.