Earth Science Ch 1 B: Question Preview (ID: 6206)

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Which type of evidence was NOT used by Alfred Wegener to support his continental drift hypothesis?
a) evidence from landforms
b) evidence from fossils
c) evidence from human remains
d) evidence from climate

Most geologists rejected Alfred Wegener’s idea of continental drift because
a) they were afraid of a new idea.
b) Wegener was interested in what Earth was like millions of years ago.
c) Wegener used several different types of evidence to support his hypothesis.
d) Wegener could not identify a force that could move the continents.

What technology did scientists use in the mid-1900s to map the mid-ocean ridge?
a) satellites
b) deep-sea diving
c) submarines
d) sonar

In sea-floor spreading, molten material rises from the mantle and erupts
a) along the edges of all the continents.
b) along mid-ocean ridges
c) in deep-ocean trenches
d) at the north and south poles

What did scientists in a submersible see when they observed the mid-ocean ridge?
a) a convergent boundary
b) rocks formed by the rapid hardening of molten material
c) the movement of Earth’s plates
d) convection currents in the ocean

The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as
a) convection
b) continental drift
c) subduction
d) conduction

Old oceanic crust is more dense than new oceanic crust because it is
a) hot
b) moving toward a deep-ocean trench.
c) cool
d) closer to the mid-ocean ridge

Most geologists think that the movement of Earth’s plates is caused by
a) conduction
b) earthquakes
c) convection currents in the mantle
d) Earth’s magnetic field.

The geological theory that states that pieces of Earth’s lithosphere are in constant, slow motion is the theory of
a) subduction
b) plate tectonics
c) deep-ocean trenches
d) sea-floor spreading

Earth’s mantle is
a) a layer of molten metal
b) a layer of hot rock
c) a dense ball of solid metal
d) a layer of rock that forms Earth's outer skin

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