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Where are mid-ocean ridges found?

What geologist discovered sea-floor spreading and when?

Sea-Floor Spreading

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6th grade concept of sea-floor spreading

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Questions 10

Answers

1
What geologist discovered sea-floor spreading and when?
Hess - 1950s
Wegener - 1900s
Wegener - 1950s
Hess - 1900s
2
Where are mid-ocean ridges found?
long deep-ocean trenches.
mostly along coastlines.
only in the Pacific Ocean.
in all of Earth's oceans.
3
What technology did scientists use in the-1900s to map the mid-ocean ridge?
satellites
submarines
sonar
deap-sea diving
4
What did scientists in a submersible see when they observed the mid-ocean ridge?
the movement of the earth's plates
a colliding boundary
pillow lava being formed by the rapid har
the convection currents in the ocean
5
In sea-floor spreading, molten material rises from the mantle and erupts
at the north and south poles.
along the edges of all the continents.
in deep-ocean trenches.
along mid-ocean ridges.
6
What feature occurs at X?
deep ocean trench
subduction
sea-floor
mid-ocean ridge
7
The process of the ocean floor sinking beneath a deep-ocean trench and back into the mantle is
subduction
continental drift.
conduction
convection
8
What feature occurs at Y?
mid-ocean ridge
subduction
deep ocean trench
sea-floor
9
Scientists discover that rocks farther from the mid-ocean ridge were older than those near it
by mapping rocks on the sea floor using sonar
by determining the age of rock samples from the sea floor
by observing eruptions of molten material on the sea floor
by measuring how fast sea-floor spreading occurs
10
What process occurs at Z?
sea-floor
mid-ocean ridge
subduction
deep ocean trench