Scince

Front 1

what is earth scince

Back 1

earth scince is the study of all proscesses and events that affect the appearance and form of the natural surface of the earth

Front 2

mesosphere

Back 2

mostly solid
very hot
flows slowly under pressure

Front 3

geologic time

Back 3

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.

Front 4

law of uniformitarianism

Back 4

physical laws proscesses same way as in the past.
ex. wave action ripples in the sand

Front 5

law of uniformitarianism

Back 5

physical laws proscesses same way as in the past.

Front 6

gaia hypothesis

Back 6

living organisms physical environment

Front 7

asthenosphere

Back 7

newly idenitified (1970)
plastic state ie. part liquid and part solid
used to help explain continental drift (movment of the earth crust)

Front 8

lithosphere

Back 8

solid outer layer
rocks hard and rigid

Front 9

outer core

Back 9

under less pressure than the inner core
very high temoerature
liquid state

Front 10

layers of the earth

Back 10

lithosphere
asthenosphere
mesosphere
outer core
solid core