Oceanography Ch. 1

The deepest point in the ocean is deeper than Mount Everest is high

true

continental crust is less dense than oceanic crust

true

the origin of earths oceans and atmosphere are a result of density stratification

true

The GPS system is a tool used for

determining surface location

The Oceans are believed to have been formed about

4 billion years ago

Approx. what percentage of the earth is covered by oceans

71%

During the age of discovery these events occurred

Captain James Cook explored the pacific, Magellan circumnavigated the earth, Columbus discovered the new world

What determines the Order of earths layers

Density

Density stratification has caused our earth to be homogenous throughout

FALSE

Who circumnavigated the earth in the victoria

Ferdinand Magellan

The Physical property of the asthenosphere is best described as

Plastic

What is the deepest ocean on earth

Pacific

Charles darwin suggested that the changes organisms display through time were the result of

adaptations to different environmental conditions

science supports the explanation of the natural world that

best explains all available observations

The vertical movement of crust to accommodate additional weight or removal or weight is called

isostatic adjustment

The cosmological model for the formation of the sun and the rest of our solar system is the

nebular hypothesis

Stanley Millers 1952 experiment demonstrated

organic molecules could be created from the materials contained in earths early atmosphere and oceans

The early oceans and atmosphere are thought to have come from inside the earth from the process

outgassing

which gas was not abundant in earths early atmosphere

oxygen

the most accurate scientific estimation of earths age is based on

radiometric dating on rocks

The principal goal of science

to explain the causes and effects of observable natural phenomena

All of the continents could fit into the space occupied by the pacific ocean

true

Continental crust is made of rock that is relatively light in color

true

Earth is layered based on density , with the highest density material located the deepest

true

Earths internal layers can be described by their composition or by their physical properties

true

Molten Material will rise if it is less dense than the surrounding material

true

Molten material will sink if it is more dense than the surrounding material

true

The asthenosphere is a plastic layer that extends from the base of the lithosphere toa depth of about 700 km

true

The asthenosphere is very hot and contains areas of partially molten rock

true

The subdivisions of the geological timescale

were initially based on fossil evidence, extinctions and boundaries of sedimentary rock units

The age of discovery was the time period in ocean exploration history when

western europeans realized the vastness of the earths oceans