Lesson
Igneous Rocks
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chelsie_belkholm_52057
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  • Slide 1
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    Igneous Rocks

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  • Slide 2
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    Vocabulary Review

    • Mineral: natural, solid substance that has a definite chemical composition and physical structure

    • Magma: melted rock within the earth

    • Igneous Rock: forms when magma is pushed up from the mantle into the cool crust and hardens into rock

    • Lava: Magma that reaches the surface

  • Question 3
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    Q.

    Where is lava located?

    answer choices

    above ground

    below ground

    in the core

    in the mantle

  • Question 4
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    Q.

    Where is magma located?

    answer choices

    above ground

    below ground

    in the stratosphere

    in the thermosphere

  • Question 5
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    Q. Igneous rock that forms when magma hardens beneath Earth's surface
    answer choices
    Intrusive Rock
    Compaction
    Extrusive Rock
  • Question 6
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    Q. Igneous rock that forms from lava on Earth's surface
    answer choices
    Organic Rock
    Intrusive Rock
    Extrusive Rock
  • Question 7
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    Q.

    Which type of igneous rock would be easier to mine?

    answer
    extrusive
  • Slide 8
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    Obsidian is an example of an extrusive rock. Because it cooled and hardened quickly, extrusive rocks have a fine grained texture.

  • Slide 9
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    Granite is an intrusive igneous rock. Because they cool slowly, the crystals are large giving these rocks a coarse texture.

  • Question 10
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    Q.

    Diorite is an intrusive igneous rock. What does this tell you about it?

    answer choices

    it was formed from lava that erupted onto Earth's surface

    it was formed from magma that hardened beneath Earth's surface

    it was formed from rapidly cooling lava

  • Question 11
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    Q.

    Basalt is an extrusive igneous rock. What does this tell you about it?

    answer choices

    it was formed from lava that erupted onto Earth's surface

    it was formed from slowly cooling magma

    it was formed from magma that hardened beneath Earth's surface

  • Question 12
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    Q.

    Pegmatite is a coarse-grained, intrusive, igneous rock. How did it form?

    answer choices

    rapidly cooling lava

    slowly cooling magma

  • Question 13
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    Q.

    Rhyolite is a fine-grained, extrusive, igneous rock. How did it form?

    answer choices

    rapidly cooling lava

    slowly cooling magma

  • Question 14
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    Q.

    Is this igneous rock, obsidian, fine-grained or coarse-grained?

    answer choices

    fine-grained

    coarse-grained

  • Question 15
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    Q.

    Is this igneous rock, porphyry, fine-grained or coarse-grained?

    answer choices

    fine-grained

    coarse-grained

  • Question 16
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    Q.

    What option below is NOT one of the uses of igneous rocks?

    answer choices

    statues

    kitchen counters

    building materials

    chalkboards

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