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WorksheetsCh. 7 Lesson 2 Quiz Review
Total questions: 18
Worksheet time: 9mins
What is seafloor spreading?
The process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
The process by which new continental crust forms along a mid-ocean ridge and older continental crust moves away from the ridge
The process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves towards the ridge
The process by which new continental crust forms along a mid-ocean ridge and older continental crust moves towards the ridge
What is a mid-ocean ridge?
a mountain ranges located on the seafloor in the middle of the ocean
The heavy presence of sediment on the ocean floor
a long mountain chain that is located near the oecan
The discovery of large amounts of basalt on the ocean floor
How do scientists use echo sounder to measure the ocean floor?
Scientists use echo sounder pick up satellite messages from satellites planted at the bottom of the ocean floor.
Scientists use echo sounder to measure the distance between one continent to another.
Scientists use echo sounder to measure the height of different underwater mountain ranges.
Scientists use an echo sounder to measure the depths of the ocean floor
How do mountains form along a mid-ocean ridge?
Sediment builds up around the ridge, forming mountains
The lava cools and forms new crust that cracks, causing rocks to move up or down and form mountains
Large amounts of lava erupt from the center of the ridge and cool to form mountains
The movement of the tectonic plates causes mountains to form along the ridge
What does ocean topography mean?
how deep the ocean is
how deep mid-ocean ridges can be
how wide abyssal plains are
the layout of the seafloor
How does an echo sounder work?
scientists measure data from satellites on the ocean floor
scientists send signals to the bottom of the ocean floor and then they bounce back to the ship at the surface
scientists send signals out into the ocean to see if any marine animals echo in return
it measures how wide the ocean is
Which is longer - a mid-ocean ridge or a mountain ranges found on land?
mountain range on land
mid-ocean ridge
Where does seafloor spreading take place?
in the asthenosphere
at Continental coastlines
at the bottom of the ocean
at mid-ocean ridges
What is created during seafloor spreading?
new crust
old crust
mountain ranges
mid-ocean ridges
How are the continents actually moving?
Continents move due to the movement of tectonic plates
Continents move through the solid mantle and the seafloor
Continents move as the seafloor spreads along a mid-ocean ridge
Continents move as the seafloor sinks beneath them
Which statement about seafloor spreading is NOT true?
Seafloor spreading only provides a way for new oceanic crust to be made, but does not explain Continental Drift.
Seafloor spreading explains Wegener's hypothesis of continental drift
Seafloor spreading occurs when magma rises through cracks in the crust
Seafloor spreading is the process by which new oceanic crust forms along a mid-ocean ridge
What are the large, flat areas of the ocean floor called? Oceanic crust is old here and has many layers of sediments.
seafloor spreading
mid-ocean ridges
lithosphere
abyssal plain
Which statement is NOT true about scientists use of echo sounder?
Scientists used an echo sounder to measure the depths of the ocean floor
Topographic maps of the seafloor showed large mountain ranges called mid-ocean ridges
Seafloor spreading is the process by which new oceanic crust forms along a mid-ocean ridge
The seafloor is flat
What did the discovery of seafloor spreading provide for Wegener's theory of continental drift?
how the continents are actually drifting apart
how new oceanic crust is created
how magma reaches the Earth's crust
where mid-ocean ridges are located
How are the continents actually drifting apart?
through seafloor spreading
by underwater earthquakes
by underwater volcanoes
they are pushing themselves through the solid mantle
What was the name of the scientist who used the special exploration boat named Glomar Challenger to continue exploring Continental Drift?
Alfred Wegener
Galileo Galilee
Harry Hess
Charles Richter
What did Harry Hess find as he measured the temperatures of the seafloor?
that more thermal energy is released at mid-ocean ridges
the bottom of the Mariana Trench
the megladon
underwater volcanoes
What mid-ocean ridge is the closest one to us?
Mariana Trench
Mid-Pacific Ridge
Challenger Deep
Mid-Atlantic Ridge
