ch.1

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hypothesis

A tentative, testable statement about the general nature of a phenomenon is called a/an:

true

Layers of Earth separated on the basis of density differences

nebular hypothesis

all bodies in the solar system formed from an enormous gas cloud.

lithosphere

crust and the uppermost mantle consisting of a solid rock layer

crust, lithosphere, asthenosphere, mantle, outer core, inner core.

earths interior from top to bottom:

4.6 billion years

how old is the earth?

pacific, atlantic, indian, arctic

oceans from biggest to smallest

asthenosphere

plastic (capable of flow) portion of the upper mantle beneath the lithosphere

water vapor released from volcanic outgassing

Current scientific knowledge indicates that the most likely origin of most of Earth's oceans was due to

lower

During the height of the last Ice Age (~21,000 years ago), large glaciers made the continents ride

true

Earth developed the first ocean by about 4 billion years ago.

true

The Earth's crust solidified around 4.5 billion years ago.

pacific ocean

The largest geographic feature on the surface of Planet Earth is

crust and upper mantle

The lithosphere consists of Earth's


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