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10 Cards in this Set

  • Front
  • Back
what is earth scince
earth scince is the study of all proscesses and events that affect the appearance and form of the natural surface of the earth
mesosphere
mostly solid
very hot
flows slowly under pressure
geologic time
many scientists presently believe that the earth is between 4.5 and 5 billion years old. the geologic time scale shown below is based on this assumption. as more knowledge is gained about the age of the earth, the geologic time scale will be adjusted.
law of uniformitarianism
physical laws proscesses same way as in the past.
ex. wave action ripples in the sand
law of uniformitarianism
physical laws proscesses same way as in the past.
gaia hypothesis
living organisms physical environment
asthenosphere
newly idenitified (1970)
plastic state ie. part liquid and part solid
used to help explain continental drift (movment of the earth crust)
lithosphere
solid outer layer
rocks hard and rigid
outer core
under less pressure than the inner core
very high temoerature
liquid state
layers of the earth
lithosphere
asthenosphere
mesosphere
outer core
solid core