Download Section 2-2 Igneous Rock

Section 2-2 Igneous Rock
Write the letter of the best answer next to each question.
____ 1. What kind of rock forms when hot, liquid rock, or magma, cools and solidifies?
a. sedimentary
b. igneous
c. metamorphic
d. mineral
____ 2. How are igneous rocks formed?
a. when magma cools and solidifies
b. when sediments are compacted and cemented
c. when heat and pressure squeezes rock
d. when rocks are deformed
____ 3. What is one way that magma can form? When rock is _______
a. cooled
b. when rock is cemented
c. when rock is weathered
d. when rock is heated
____ 4. Besides pressure being released, what other way can magma form? When
a. pressure builds up
b. rocks solidify
c. rocks change composition d. rocks lose water
____ 5. When magma cools, what does it form?
a. more magma
b. igneous rock
c. sedimentary rock
d. metamorphic rock
____ 6. What happens when the minerals in magma have different melting points?
a.Some minerals will become solid before others.
b.Some minerals will never solidify.
c.Some minerals will never melt.
d.All the minerals will solidify at the same temperature.
____ 7. What kind of rock forms from magma that cools below the Earth’s surface?
____ 8.
a. intrusive igneous rock
b. sedimentary rock
c. extrusive igneous rock
d. fissures
Intrusive igneous rock usually has what kind of texture?
a. coarse-grained
b. medium-grained
c. small-grained
d. fine-grained
Fill in each blank with the word or phrase that best completes the sentence.
felsic rocks
fine
mafic rocks
crystals
cooled
9. The more time the ____________________ have to grow, the larger and coarser the texture is.
10. Aluminum, potassium, silicon, and sodium make light-colored rocks called ______________
11. Dark-colored rocks called ______________________ have more calcium, iron, and
magnesium.
12. Igneous rocks differ from one another in how fast they ______________________
13. Igneous rocks that have small crystals have ______________________ grains.
____ 14. What is it called when magma erupts on the Earth’s surface?
a. intrusive igneous rock
b. metamorphic rock
c. sedimentary rock
d. extrusive igneous rock
____ 15. Besides volcanoes, where else does lava flow from?
a. fissures
b. sills
c. plateaus
d. batholiths
____ 16. What landform is created when lava flows out of a fissure onto land?
a. a rolling hill
b. a lava plateau
c. a tall mountain
d. a volcanic neck
______ 17. Is an example of a coarse-grained, felsic, igneous rock.
a. Basalt
b. Gabbro
c. Granite
d. Rhyolite
18. What determines the texture of igneous rocks? BE SPECIFIC (include time, crystals, and type of
grain)
19. How does the composition of the magma affect the temperature at which it solidifies?
20. An igneous rock forms from slow-cooling magma deep beneath the surface of the Earth. What
type of texture is this rock most likely to have? Explain.