Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/17

Click to flip

17 Cards in this Set

  • Front
  • Back
shaking of the earth's crust
earthquake
deepest layer of earth
core
thickest layer, made of solid and melted rock
mantle
point on earth's surface right above the focus of an earthquake
epicenter
layer of earth that includes land and the ocean floor
crust
continent-sized slabs that make up the crust and upper mantle
plates
break in earth's crust along which rocks move
fault
instrument that records earthquake waves
seismograph
underground point where an earthquake first starts
focus
What is earth's hottest layer?
core
Earth's plates move slowly on a thin layer of partly melted what?
mantle
What can scientists do with seismographs?
measure earthquakes
Why does California have more than 20,000 earthquakes each year?
There is a large fault running through the state.
What do some volcanoes form new as plates move apart and magma rises to the surface of the crust?
new ocean floor
What forms different kinds of volcanic mountains?
different kinds of eruptions
What might happen if Earth's plates stopped moving?
no more earthquakes, new volcanoes, and mountains
Which is a better model for a volcano erupting - a lit firecracker or a shaken can of soda? Why?
can of soda - volcanoes erupt when pressure builds up and then is released