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Earthquake Study Guide
Earthquakes & Layers of the Earth
25
Science
6th Grade
03/21/2015

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Cards

Term
Name the layers of the Earth from the outer to the inner:
Definition
crust, mantle, outer core, inner core
Term
Name the compostion of the Earth's crust:
Definition
solid
Term
Name the compostion of the Earth's mantle:
Definition
taffy
Term
Name the compostion of the Earth's inner core:
Definition
solid
Term
Name the compostion of the Earth's outer core:
Definition
liquid
Term
The crust and solid protion of the upper mantle move together and together they are called the __________________.
Definition
lithosphere
Term
The flowing part only of the mantle is called the ________________________.
Definition
asthenoshpere
Term
Heat from Earth's core causes ________________________ in the mantle.  It's these currents that carry the lithoshpere above it, causing the plates to shift.
Definition
convetion currents
Term
Alfred Wegener used observations of today's continents to develop his hypothesis of ___________________.
Definition
continental drift
Term
Name four pieces of evidence that continental drift has occured:
Definition
  1. long ago the continents were together
  2. the continents fit together like a puzzle
  3. same fossils oceans apart
  4. grooves from glaciers match
Term
________________ is the process by tectonic plates separate and new oceanic crust forms as magma rises and cools and hardens in between.
Definition
sea floor spreading
Term
Each piece of Earth's lithosphere is called a ______________.  The place between these pieces is called a __________________.
Definition
tectonic plates / boundary
Term
An oceanic plate will always sink under a continental plate at a convergent boundary because the oceanic plate is more ___________ than the continental plate.
Definition
dence
Term
Mountains form at _______________ boundaries.
Definition
convergent
Term
Waves of energy that travel through the Earth are called _____________________.
Definition
seismic waves
Term
P waves stand for___________________.
Definition
primary or pressure
Term
P waves can travel through __________________.
Definition
solids, liquids, and gases
Term
P waves are faster or slower?
Definition
faster
Term
S waves stand for _________________.
Definition
secondary waves
Term
S waves can travel through _______________________.
Definition
solids and gases
Term
S waves are slower or faster?
Definition
slower
Term
Describe the difference between the focus and the epicenter of an earthquake.
Definition
The epicenter is on the earth and directly above an earthquakes starting point.  A focus is in the earth where an earthquake begins.
Term
The ______________ is on the earth.
Definition
epicenter
Term
The _________________ is in the earth.
Definition
Term
What is the name of the scale used to measure the strength of an earthquake?
Definition
Ritcher Scale
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