Have an account?
Skip to Content
Build your own quiz
Suggestions for you
15 questions
Show Answers
See Preview
- 1. Multiple Choice
Which is not an evidence of seafloor spreading?
molten magma constantly erupting
drilling samples of rock
Magnetic stripes
Fossil evidence
- 2. Fill in the Blank
The youngest crust is found_________the mid-ocean ridge.
- 3. Multiple Choice
Why were magnetic patterns found on the ocean floor puzzling?
They did not show alternating bands of normal and reversed polarity.
They showed alternating bands of normal and reversed polarity.
No rocks were magnetic.
All rocks were magnetic.
- 4. Multiple Choice
If you are a cartographer, what would give you an idea that the continents were once joined?
ocean depth
position of the South Pole
shape of the continents
size of the Atlantic Ocean
- 5. Multiple Choice
During the 1960s, scientist were already equipped with gadgets needed to explore the deep ocean. What discovery about the ocean floor is associated with the seafloor spreading?
mountains are denser than the mantle
the rotational poles of the Earth have migrated
the crust of the continents is denser than the crust of the ocean
the crust of the ocean is very young relative to the age of the crust of the continents.
- 6. Multiple Choice
Which of the following can you infer from the continuous movement of the lithospheric plates over the asthenosphere?
all the continents will cease to exist
all the volcanoes in the Philippines will become inactive
the continents will not be located in the same place as they are now
the islands of the Philippines will become scattered all over the world
- 7. Multiple Choice
The lithospheric plates are believed to be moving slowly. What is the driving force that facilitates this movement?
gravitational force of the moon
magnetic force at the poles
convection current in the mantle
the force of the atmosphere
- 8. Multiple Choice
If all the inner layers of the Earth are firm solid, what could have happened to Pangaea?
it remained as supercontinent
it would have become as it is today
it would have slowly disappeared in the ocean
it would have stretched and covered the whole world
- 9. Multiple Choice
Which observation was NOT instrumental in formulating the hypothesis of seafloor spreading?
depth of the ocean
identifying the location of glacial deposits
magnetization of the oceanic crust
thickness of seafloor sediments
- 10. Multiple Choice
As the new seafloor is formed at the mid-ocean ridge, the old seafloor farthest from the ridge is destroyed. Which of the stated processes describes how the oceanic crust plunges into the Earth and destroyed at the mantle?
convection
construction
diversion
subduction
- 11. Fill in the Blank
The ______________ is a soft, weak upper portion of the mantle where the lithospheric plates float and move around.
- 12. Fill in the Blank
The process by which new ocean floor is formed near the mid-ocean ridge and moves outward is called _______________.
- 13. Fill in the Blank
The ______________ is an area in the middle of the ocean where new ocean floor is formed when lava erupts through the cracks in the Earth's crust.
- 14. Multiple Choice
Which among the evidences are under the Continental Drift theory?
rock evidences
magnetic evidence in rocks
fossil evidences
puzzle like fit of continents
- 15. Fill in the Blank
___________________ is a theory which suggests that the Earth's crust is made up of plates that interact in various ways, thus producing earthquakes, mountains, volcanoes, and other geologic features.
- Answer choicesTagsAnswer choicesTags