Pangea And Seafloor Spreading: Question Preview (ID: 14603)


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What is the continental drift theory?
a) the belief that continents have quickly moved apart to their current locations on Earth b) the belief that continents are moving slowly together from their current locations on Earth c) C) the belief that continents have always been located at their current locations on Earth d) the belief that continents have moved slowly apart to their current locationson Earth
Who first proposed the theory of continental drift?
a) Harry Hess b) Galileo Galilei c) Albert Einstein d) Alfred Wegener
What is Pangaea?
a) Earth's inner core b) the large landmass in which all continents once were connected c) the large landmass that all continents are currently forming d) the largest fault found on Earth
What clue supported the continental drift theory?
a) Fossils of animals have been found on continents separated by oceans. b) Similar rock structures have been found on different continents. c) a puzzle-like fit of all the continents d) all of the above
What evidence proved that South America, Africa, India, and Australia were once covered by glaciers?
a) enormous valleys formed by glaciers b) glacial deposits and rock surfaces scarred by glaciers c) leftover portions of glaciers d) cold climates
How do scientists use sound waves to figure out the shape of the ocean floor?
a) The longer it takes a sound wave to return to the ship, the more shallow the water is. b) The longer it takes a sound wave to return to the ship, the deeper the water is. c) The less time it takes a sound wave to return to the ship, the deeper the water is. d) The longer it takes a sound wave to return to the ship, the colder the water is.
Why was the discovery of no rocks older than 2 billion years old on the ocean floor so important?
a) A) This evidence proved that the rocks on the seafloor were older than rocks on continents. b) This evidence proved that new seafloor features are constantly being added due to continental drift. c) This evidence proved that new seafloor features are constantly being added due to reversals of Earth d) This evidence proved that new seafloor features are constantly being added due to seafloor spreading
How do scientists explain the formation of underwater mountain ranges?
a) continental drift b) convection currents c) seafloor spreading d) strike-slip faults
What is a magnetic field reversal?
a) when Earth's magnetic field leaves the south pole and enters the north pole b) when Earth's magnetic field suddenly disappears for short periods of time c) when Earth's magnetic field leaves the north pole and enters the south pole d) when Earth's magnetic field suddenly runs east/west instead of south/north
What tool does a scientist use to detect magnetic fields?
a) a magnetogram b) a thermometer c) a fieldometer d) a magnetometer
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