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Science Q2T1 2015 Part 2
Test Description: Ch. 6 Plate Tectonics
Instructions: Answer all questions to get your test result.
1) Early studies of the ocean floor helped to develop the theory of plate tectonics because they showed that
A
oceanic crust is oldest near the center of a mid-ocean ridge
B
oceanic crust is nearly the same age as continental crust
C
oceanic crust is younger near a deep-ocean trench
D
the age of oceanic crust increases with distance from a mid-ocean ridge
2) Subduction occurs
A
when two continental plates converge
B
when an oceanic plate and another plate converge
C
when two oceanic plates pull apart
D
along a transform boundary in the ocean
3) Which of these did Wegener use to support his theory of continental drift?
A
similar rocks and similar fossils on different continents
B
sea-floor spreading and similar rocks on different continents
C
convection currents in the asthenosphere and sea-floor spreading
D
fossils from ancient organisms and convection currents in the asthenosphere
4) Oceanic crust at a mid-ocean ridge is
A
about the same age as continental crust
B
older than crust near a trench
C
younger than crust near a trench
D
much older than continental crust
5) Scientists think that the main driving force of plate tectonics is
A
slab pull
B
convection in the asthenosphere
C
ridge push
D
convection in the lithosphere
6) Which of the following is also known as a spreading center?
A
convection boundary
B
transform boundary
C
convergent boundary
D
divergent boundary
7) Earth's magnetic reversals are recorded in
A
the mantle
B
deep-ocean trenches
C
the asthenosphere
D
sea-floor rock
8) At transform boundaries, two plates
A
pull away from each other
B
scrape past each other
C
push against each other
D
do not move in any direction
9) The Alps are forming as a result of the European and African plates pushing against each other. This is an example of
A
oceanic-oceanic subduction
B
oceanic-continental collision
C
oceanic-continental subduction
D
continental-continental collision
10) Many scientists rejected continental drift when it was first proposed because
A
Wegener could not explain how Earth's continents moved
B
reversals in Earth's magnetic field had not yet occurred
C
Wegener had no evidence to explain the existence of Pangaea
D
studies of the ocean floor revealed its younger age
*select an answer for all questions
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