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

1/9

Click to flip

9 Cards in this Set

  • Front
  • Back
Nitrogen
78% of the earth's atmosphere
prevailing westerlies
wind belt for Arizona
Atmosphere
air surrounding the earth
mesosphere
contains the ozone layer
Troposphere
layer of air at the earth's surface
wind
created by the suns heat
oxygen
air surrounding the earth
Seasons
created by the earth's tilt.
Stratosphere
jets fly in this layer