Download Chapter 6 Notes

Chapter 6 Notes
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Rocks formed at lower temperatures are more stable.
Rocks have natural weaknesses and break along joints.
The three types of rock are sedimentary, igneous, and metamorphic.
Any rock type may change into any other rock type through the rock cycle.
Molten rock at Earth’s surface is called lava and molten rock underground is
called magma.
6. Partial melting means that minerals melt at different temperatures.
7. Fractional crystallization means that different minerals form crystals at
different times.
8. Igneous rocks with large crystals form underground slowly, whereas small
crystals form quickly at Earth’s surface.
9. Felsic I.R. are light colored, high in silica, and examples are granite and
pumice.
10.Mafic I.R. are dark, low in silica, high in iron and magnesium, and examples
are basalt and gabbro.
11.Intrusive I.R. has large crystals, granite is an example.
12.Extrusive I.R. has small crystals, pumice is an example.
13.Sedimentary rocks form ONLY at Earth’s surface and contain fossils.
14.The process of making sedimentary rock – weathering & erosion,
transportation, deposition, and cementation & compaction.
15.Sedimentary rock types include chemical (evaporates), organic (limestone),
and clastic (sandstone).
16.Metamorphic rock is formed by high temperatures and pressure
underneath Earth’s surface near magma.
17.Foliated metamorphic rock has bands or stripes (gneiss).
18.Non-foliated metamorphic rock has no bands (marble).
Chapter 6 Notes
1. Rocks formed at ______________________ temperatures are more
________________.
2. Rocks have natural weaknesses and break along _______________.
3. The three types of rock are ____________________, __________________,
and ____________________________.
4. Any rock type may change into any other rock type through the
____________ _____________.
5. Molten rock at Earth’s surface is called ____________ and molten rock
underground is called _______________.
6. ___________________ melting means that minerals _____________ at
different temperatures.
7. Fractional ______________________ means that different minerals form
crystals at different _______________.
8. Igneous rocks with _______________ crystals form underground slowly,
whereas small crystals form ________________ at Earth’s surface.
9. _______________ I.R. are light colored, high in _____________, and
examples are ____________________ and pumice.
10._____________ I.R. are _______________, low in silica, high in
___________ and magnesium, and examples are ________________ and
gabbro.
Chapter 6 Notes
11.______________________ I.R. has large crystals, granite is an example.
12.______________________ I.R. has small crystals, pumice is an example.
13.Sedimentary rocks form ____________ at Earth’s surface and contain
_______________________.
14.The process of making sedimentary rock – _________________ & erosion,
transportation, ___________________, and _________________ &
compaction.
15.Sedimentary rock types include ________________ (evaporates),
________________ (limestone), and _____________ (sandstone).
16.Metamorphic rock is formed by _______________ temperatures and
______________________ ___________________________ Earth’s surface
near magma.
17.________________________ metamorphic rock has bands or stripes
(gneiss).
18.______________________________ metamorphic rock has no bands
(marble).