Rock
How are metamorphic rocks classified?
By foliated (banded) or nonfoliated (not banded) appearance
Sediment is formed from —
All 3 types of rocks
Igneous rocks are formed by —
Cooling and hardening of molten rock
Sedimentary rock layers are always deposited —
horizontally
What produces magma?
Rocks melting
What are two rocks that are examples of metamorphic rock?
Marble and quartzite
What kind of rocks do sedimentary or igneous rocks become when they are changed by heat or pressure?
Metamorphic rocks
Igneous rocks are classified as either —
intrusive or extrusive
Rocks formed by the cementing of weathered materials are called —
sedimentary rocks
Coal, an important energy resource, is actually —
an organic sedimentary rock
Which is a characteristic of all nonfoliated metamorphic rocks?
Lack of banding
Why is sedimentary rock capable of preserving fossils?
Sedimentary rock does not require excessive heat during formation.
Which igneous rock would contain large crystals?
granite
In which type of rock are fossils most likely to be found?
Sedimentary
Scientists use the rock cycle to describe the processes by which—
one type of rock can be changed into another type of rock
Metamorphic rock is formed by —
heat and pressure
Sedimentary rocks are classified according to —
the process that formed the particles
Fine grained igneous rocks are formed —
as they cool quickly
When granite is subjected to high enough amounts of heat and pressure to change it but not melt it, granite changes into —
a metamorphic rock
Cementation and compactions processes can form what type of rock?
Sedimentary rock
Metamorphic rocks with a layered or banded look are called —
foliated
What best describes a sedimentary rock?
Rock formed by the deposition and compression of small pieces of matter and debris in layers over time.
While on vacation, a student visits the area around a volcano that has recently erupted. The student can expect to find samples of
extrusive igneous rock
A geologist studying volcanic activity is collecting rocks that formed from hot, molten magma. What type of rock is the geologist collecting?
Igneous
What is true about common rocks and minerals? (4)
1. They are used to produce products important to everyday life
2. They are used to make goods such as jewelry
3. They are important to the US economy
4. They can be very valuable