Active Volcanos!

kiss of death right on my tounge asked:


1. The supercontinent in the continental drift hypothesis was called ____. (1 point)
Panthalassa
Pangaea
Mesosaurus
Africa

2. Wegener’s idea that tidal forces might cause continental drift was shown to be impossible when it was ____. (1 point)
determined that Earth’s magnetic field was too strong
shown that the tidal forces needed to move continents would stop Earth’s rotation
determined that Earth’s density was too low
shown that no tides occurred 200 million years ago

3. The lithospheric plates move an average of ____. (1 point)
5 inches per year
50 inches per year
5 centimeters per year
50 centimeters per year

4. Which list places the locations in the correct sequence, with the initial seafloor spreading stage first, followed by more advanced stages in the seafloor spreading process? (1 point)
Red Sea, African Rift Valley, Atlantic Ocean
Atlantic Ocean, African Rift Valley, Red Sea
African Rift Valley, Atlantic Ocean, Red Sea
African Rift Valley, Red Sea, Atlantic Ocean

5. Which of the following does NOT occur at a subduction zone? (1 point)
The leading edges of both plates are bent upward.
Oceanic crust is pushed down into the mantle.
A continental plate moves over an oceanic plate.
One oceanic plate moves beneath another oceanic plate.

6. If a deep ocean trench is located adjacent to a continent, active volcanoes would likely be found ____. (1 point)
seaward from the trench
along the axis of the trench
at the ends of the trench
landward from the trench

7. Magnetic reversals ____. (1 point)
cause the movements of tectonic plates
confirmed the existence of subduction zones
provide strong evidence for seafloor spreading
have never occurred during geologic time

8. What do strips of low-intensity magnetism represent on the ocean floor? (1 point)
areas where there is no magnetism
areas where the rocks have a normal polarity
areas where the rocks have a reversed polarity
areas of different types of rock

plz dont comment if you cant help thank you.

JIMMIE