Plate Tectonic Theory Flashcards
True or False: The lithosphere is composed of oceanic and continental plates.
True
True or False: These plates are explained by the Plate Tectonic Theory.
True
The Plate Tectonic Theory is supported by _ and _.
Sea Floor Spreading and Continental Drift Theory
True or False: The Plate Tectonic Theory is evident because of some fossils, rocks, glacial deposits, climate changes, and paleomagnetism in different continents.
True
This theory associates earthquakes, volcanoes, mountains, and other geophysical phenomena to the interaction of the plates.
Plate Tectonic Theory
According to the Plate Tectonic Theory, the surface of the Earth is divided into…?
Moving Plates
The German scientist who noticed that continents are like puzzle pieces in the 1900s.
Alfred Wegener
Wegener hypothesized that the continents were one before, and it was called…?
Pangea
True or False: Wegener based his hypothesis on his puzzle piece set having the Earth as its design.
False. He based his hypothesis on the fitted edge of continental shorelines.
True or False: Wegener observed the difference of the geological features of different continents.
False. He observed the same geological features of the different continents.
True or False: Wegener observed the obscure shift of climate.
False. He observed the apparent shift of climate.
True or False: Wegener observed the Gondwana Sequence.
True
True or False: Scientists did not believe that the landmass could move kilometers away from each other.
True
True or False: In the 1940s, the paleomagnetism, convection current, and the seafloor spreading still did not confirm Wegener’s hypothesis.
False. In the 1940s, the paleomagnetism, convection current, and the sea floor spreading confirmed Wegener’s hypothesis.
This continuous cycle creates circular motion under the plates, causing the continents to move.
Convection Current
True or False: The lower mantle is hotter than the upper mantle.
True
The cooler materials of the mantle sink to the core, which will (increase or decrease?) their temperature.
Increase
As the (cooler or warmer?) materials sink, the hotter materials rise to fill up the spaces left by the cooler ones.
Cooler
True or False: The continents are drifting at a rate of 5-10 m per year.
False. The continents are drifting at a rate of 5-10 cm per year.
True or False: After 10 million years, significant changes can be seen.
False. After 50 million years, significant changes can be seen.
True or False: In 50 million years, the Atlantic and Indian Oceans will become larger.
True
True or False: In 50 million years, Pacific Ocean will also become larger.
False. In 50 million years, Pacific Ocean will become smaller.
True or False: In 50 million years, there will be an Australia-Asia collision.
True
True or False: In 50 million years, Mediterranean Sea will disappear as Africa drifts north.
True
Who was the US Navy man led the discovery of spreading seafloor in the 1900s?
Harry Hess
Hess and his team discovered underwater mountains. What is it called?
Mid-Ocean Ridge.
A mid-ocean ridge has a deep crack which runs through the center. What is it called?
Rift Valley
The crack of the ridge leaks with magma which solidifies to become a…?
Seafloor
True or False: Because of convection, more magma is coming out, then solidified.
True
True or False: The younger sea floor pushes away the old sea floor, causing it to spread bringing with them the continents.
True
True or False: Old rocks underwater are near from mid-oceanic ridge.
False. Old rocks underwater are far from mid-oceanic ridge.
