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- 1. Multiple Choice
In the Atlantic ocean, where is the youngest seafloor located?Towards the edges, near the eastern and western continentsTowards the middle of the oceanTowards the north and south polesYoung seafloor is located randomly throughout the ocean - 2. Multiple ChoiceHow do scientists figure out the age of the seafloor?They research it from ancient sea maps that trading vessels would use in the 1700sThey use the moon phases and eclipses to calculate the ageThey use seismographs and the depth as well as location of earthquakes to calculate the ageThey take drill ships to many locations in the oceans and collect, then date, rock samples.
- 3. Multiple ChoiceTrue or False: The Mid-Atlantic ridge in the Atlantic ocean is the ONLY example of a divergent boundary (<---->)TrueFalse
- 4. Multiple ChoiceTrue or False: The continents on the eastern (the Americas) and western (Europe, Africa) side of the Atlantic Ocean are moving closer together.TrueFalse
- 5. Multiple ChoiceTrue or False: The Pacific Ocean is shrinkingTrueFalse
- 6. Multiple ChoiceWhat is FALSE about the age pattern on the seafloor in the Atlantic Ocean?The pattern is symmetrical on each side of the Mid-Atlantic ridge (plate tectonic boundary)The oldest seafloor can be found towards the edges of the ocean, near the eastern and western continentsThe youngest sea floor can be found towards the edges of the ocean, near the eastern and western continentsSeafloor near the Mid-Atlantic ridge (plate tectonic boundary) can be up to 10 million years old
- 7. Multiple ChoiceWhat two words are BEST used to describe how the seafloor spreads?Magma and convectionEarthquakes and convectionMagma and conventionVolcanoes and earthquakes
- 8. Multiple ChoiceTrue or False: Our continents will eventually become a supercontinent (like Pangaea) again, far in the futureTrueFalse
- 9. Multiple ChoiceWhat is the rate at which the Atlantic Ocean is expanding?Between 5-10 mm per yearBetween 5-10 cm per yearBetween 5-10 km per yearBetween 5-10 inches per year
- 10. Multiple ChoiceTrue or False: The plates will never stop movingTrueFalse
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