Transcript 3 Most missed Questions from the Rock Test 2010

3 Most missed Questions
from the Rock Test 2010
Mr. Sturken’s classes
September, 2010
11.When temperature and pressure
change, what can happen to the minerals
in a rock?
• Key- The question is asking about the
forces that create metamorphic rock
When rocks are exposed to heat and
pressure, they can become metamorphic
rocks
The minerals in a metamorphic rock
are different than the minerals in the rock
they formed from so….
They change into other minerals
Metamorphic Rock
• When rock changes into
metamorphic rock, its
appearance, texture, crystal
structure and mineral content
change
• Metamorphic rock can form out
of igneous, sedimentary, or
other metamorphic rock.
21. What kind of texture will a
conglomerate rock have?
• Coarse-grained
(large grains)
Types of Clastic Sedimentary
Rock
• Conglomerate and Breccia can
have a mixture of rock fragments
of different sizes but we always
consider them to be coarsegrained
• Conglomerate has round
fragments
• Breccia has large sharp-edged
fragments
22. What determines the
composition of a rock?
• Composition refers to “what something
is made of”.
• What are rocks made of?
Rocks are made of minerals and
organic materials
So… the composition of a rock is
determined by the minerals it is
made of
Chapter 9 Fossils- Law of
Uniformitarianism
• So, a brief definition of
Uniformitarianism would be: the natural
laws that govern geologic processes
have not changed over geologic time,
but the rate at which certain geologic
processes operate can
vary. Uniformitarianism also has been
paraphrased as "The Present is the Key
IS NOT FROM THE ROCK TEST,
to the Past". THIS
IT IS A NEW TOPIC
From http://www.indiana.edu/~geol105b/1425chap6.htm