Geology 100 Self-Test 11

Answer the questions below and then click "submit" to send your answers.

  1. A surface separating different types of rocks is called:

    2. Your answer:
    a xenolith
    a contact
    chill zone
    none of the above

  2. The major difference between intrusive and extrusive igneous rocks is:

    3. Your answer:
    where they solidify
    their chemical composition
    the type of minerals they contain
    all of the above

  3. Which is not an intrusive rock type?

    4. Your answer:
    gabbro
    diorite
    granite
    andesite

  4. The most common igneous rock on the continents is

    5. Your answer:
    basalt
    granite
    rhyolite
    ultramafic

  5. Granite and rhyolite are different in

    6. Your answer:
    texture
    chemistry
    mineralogy
    the kind of magma that each crystallized from

  6. The difference in texture between intrusive and extrusive rocks is primarily due to

    7. Your answer:
    different mineralogy
    different rates of cooling and crystallization
    different amounts of water in the magma

  7. How can geologists recognize shallow intrusives from deeper intrusives? (choose all that apply)

    8. Your answer:
    mineralogy
    size
    texture
    chemistry

  8. A change in magma composition due to melting of surrounding country rock is called

    9. Your answer:
    Magma mixing
    assimilation
    crystal setting
    partial melting

  9. How would you distinguish andesite from a diorite?

    10. Your answer:

  10. What is the difference between a dike and a sill?

    11. Your answer: