2.2 GUIDED READING Classifying Rocks. 1. Earth’s crust of made of rock.
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Transcript of 2.2 GUIDED READING Classifying Rocks. 1. Earth’s crust of made of rock.
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2.2 GUIDED READINGClassifying Rocks
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1. Earth’s crust of made of rock.
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2. Circle the letter of each characteristic that geologists use to classify rocks.
a. Textureb. Mineral compositiond. color
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3. What are rocks made of?
Mixtures of minerals and other materials
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4. Circle the letter of each mineral that is found in granite.
a. Quartzb. Feldsparc. Micad. hornblende
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5. True or False?Most rocks can be identified by color alone.
FALSE
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6. The look and feel of a rock’s surface is its texture.
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7. Particles of minerals and other rocks that make up a rock are called grains.
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8. True or False?A rock’s grains give the rock its texture.
TRUE
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9. Circle the letter of each sentence that is true about the grain size in rock.
a. An example of a coarse-grained rock is diorite.
b. An example of a fine-grained rock is slate.
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10. Complete the concept map showing the characteristics of rock texture.
GRAIN SHAPE
GRAIN PATTERN
FINE GRAIN
NO VISIBLE GRAIN
ROUNDED GRAIN
BANDED
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10 G. True or False?
Coarse grain is a term that describes a rock's grain pattern.
FALSE
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11. Circle the letter choice that determines the grain shape of a rock such as granite.
a. Shape of the rock’s crystals.
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12. Circle the letter of the choice that determines the grain shape of a rock such as conglomerate.
d. Shape of fragements
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13. Circle the letter of the description of the grain pattern of gneiss.
a. It looks like different colors in bands
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14. Circle the letter of the sentence that is true about rocks with no visible grain.
a. Some rocks without crystal grains cooled very quickly.
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15. How do geologists classify a rock?
According to its origin
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16. List the three major groups of rock.
a. Igneousb. Sedimentaryc. metamorphic
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igneous
sedimentary
metamorphic
17
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17d. What do the major types of rocks have in common?
The three groups are alike because they are all rock, which means they are mixtures of minerals and other materials.
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18. The type of rock that forms from magma or lava is igneous rock.
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19. The type of rock that form in layers is sedimentary rock.
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20. True/False
Most metamorphic rocks form close to the surface.
FALSE