Igneous Rocks Test With Answers
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Chapter 3
Rocks
Section 3.2 Igneous Rocks
This section discusses the characteristics of igneous rocks.
Reading Strategy
Outlining Complete the outline as you read. Include points about
how each of these rocks form, some of the characteristics of each rock
type, and some examples of each. For more information on this
Reading Strategy, see the Reading and Study Skills in the Skills and
Reference Handbook at the end of your textbook.
I. Igneous Rocks
A. Intrusive Rocks
rock that forms when magma hardens beneath Earth’s surface
1.
Common example of igneous intrusive rock is granite.
2.
B. Extrusive Rocks
rock that forms when lava hardens
1.
Common example of igneous extrusive rock is rhyolite.
2.
Formation of Igneous Rocks
Match each description to its term.
Description
Term
f
1. the meaning of the Latin
a. magma
word ignis
b. granite
c
2. rocks that form when magma
c. intrusive igneous
hardens beneath Earth’s surface
d. lava
g
3. rocks that form when lava hardens
e. rhyolite
a
4. melted material beneath Earth’s
f. fire
surface
g. extrusive igneous
d
5. melted material at Earth’s surface
b
6. an intrusive igneous rock that
forms when magma cools slowly
beneath Earth’s surface
e
7. an extrusive igneous rock that
forms when lava cools quickly
at Earth’s surface
Earth Science Guided Reading and Study Workbook
21
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