4.11: Earth's Minerals and Rocks- Challenge 2
- Page ID
- 5371
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- 1. A metamorphic rock forms from other rocks that are exposed to increased ___ and ___.
- temperature; pressure.
- 2. When describing the texture of a rock or mineral, which features should be examined?
- Size, shape, and the arrangement of mineral grains
- 3. Two different rocks must always differ in their ___.
- composition and/or texture
- 4. Changes in ___ and ___ result in the formation of metamorphic rocks.
- temperature; pressure
- 5. Sedimentary rocks are made up of ___.
- pieces of other rocks that have cemented together
- 6. Which type of rock often contains fossils?
- Sedimentary
- 7. Although both these types of igneous rock cool from magma, the composition of ___ rock is higher in iron and magnesium, while that of ___ rock is higher in aluminum, sodium, and silica.
- mafic; felsic
- 8. ___ indicates the temperature at which minerals melt or crystallize.
- Bowen's Reaction Series
- 9. Different ___ have different compositions and contain whichever elements and gases that were in the rocks that melted.
- magmas
- 10. If a rock has many holes from gas bubbles, it is ___.
- a vesicular rock
- 11. Large mountain ranges consisting of intrusive igneous rocks form when ___.
- magma cools deep in the crust and then the resulting plutons are uplifted
- 12. Extrusive igneous rocks are also called ___ rocks.
- volcanic
- 13. Which type of igneous rock is light in color?
- Felsic
- 14. Which type of igneous rock is dark in color?
- Mafic
- 15. ___ have very low silica content but high iron and magnesium content.
- Ultramafic