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Module 6
Apologia Physics and Chemistry Module 6 study
13
Science
9th Grade
12/05/2011

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Term
sedimentary rock
Definition
rock formed when chemical reactions cement sediments together, hardening them 
Term
plastic rock
Definition
rock that behaves something like a liquid and a solid
Term
fault
Definition
the boundary between two sections of rock that move relative to one another
Term
epicenter
Definition
the point on the surface of the earth directly above an earthquake's focus
Term

scientists often separate the earth into five distinct sections.  

Mame those sections:

Definition

atmosphere

hydrosphere

crust

mantle

core

Term
What tow regions of the earth does the Moho discontinuity separate? 
Definition
Moho separates crust from mantle
Term
What is the main thing scientists observe in order to learn about the makeup of the earth's interior?
Definition
seismic waves
Term
What causes the magnetic field of the earth?
Definition
a large amount of electrical flow in teh core
Term
What makes the rapid-decay theory more scientifically valid than the dynamo theory?
Definition
It has been used to accurately predict the magnetic fields of other planets
Term
Why would life cease to exist without the earth's magnetic field?
Definition
cosmic rays from the sun would hit earth
Term
what are the "plates" in plate tectonics?
Definition
they are large islands of the earth's lithosphere
Term
What is Pangaea?
Definition
it is a supercontinent that might have existed in earth's past
Term
Name the four kinds of mountains and what is required for the formation of each:
Definition
  1. volcanic
  2. domed
  3. fault block
  4. folded
  • volcanic and domed require magma from the mantle
  • fault block mountains need vertical motion along a fault.
  • folded mountains need rock masses pushing against each other.
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