Gen Sci Ch 31 Question Preview (ID: 44294)


Plate Tectonics. TEACHERS: click here for quick copy question ID numbers.

Isostacy is
a) the horizontal movement of the crust
b) the process of magnetic reversal
c) the vertical movement of the crust
d) the amount of matter in a set amount of space

Our knowledge of the core is based on
a) seismology
b) studying hydrothermal vents
c) drilling directly into it
d) all of the above

4.6 billion years ago, Earth became sorted into density-based layers in the process of
a) isostacy
b) differentiation
c) seafloor spreading
d) magnetic reversal

Seafloor spreading was the hypothesis of
a) Alfred Wegener
b) Harry Hess
c) Alfred Nobel
d) Albert Einstein

Seafloor spreading is __ the rate of subduction.
a) less than
b) greater than
c) equal to
d) all of the above, depending on the time of year

The sinking of the oceanic lithosphere into the asthenosphere
a) continental drift
b) plate tectonics
c) isostacy
d) subduction

Which is not something that pushes seafloor apart?
a) gravity
b) convection
c) radiation
d) none of the above

Two plates moving past one another is a
a) transform boundary
b) convergent boundary
c) divergent boundary
d) impossibility

Which layer is NOT a layer based on composition?
a) crust
b) lithosphere
c) mantle
d) core

Meteorology is the study of
a) meteors
b) space
c) weather
d) volcanoes

Organisms in ocean trenches get energy from
a) photosynthetic organisms
b) nothing can live in ocean trenches
c) the cold water
d) chemosynthetic organisms

The innermost layer of Earth is
a) solid
b) liquid
c)
d)

The layer that is composed of the crust and the upper mantle
a) crustle
b) mantust
c) lithosphere
d) asthenosphere

the process by which new lithosphere is created at midocean ridges as older lithoshere moves away
a) convergent boundaries
b) divergent boundaries
c) transform boundaries
d) seafloor spreading

We are able to study the mantle by
a) sampling molten rock from volcanic vents
b) observing Earth's magnetic field
c) drilling directly through the crust and accessing the mantle
d) all of the above

Earth's innermost layer, which is mostly iron and includes the inner core and outer core
a) crust
b) asthenosphere
c) lower mantle
d) core

separate pieces of lithosphere that move on top of the asthenosphere
a) mantles
b) tectonic plates
c) density
d) landbridges

the study of the history, structure, and natural processes of planet Earth
a) very cold
b) high pressure
c) darkness
d) all of the above

What are conditions like in ocean trenches?
a) Earth science
b) geography
c) Life science
d) astronomy

What was not evidence of continental drift?
a) the same kinds of fossils being found on several continents
b) matching rock formations
c) landbridges
d) the continents look like they fit together like a puzzle

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