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5 Written questions

5 Matching questions

  1. Mid Atlantic Ridge
  2. Divergent Boundary
  3. Outer Core
  4. Paleozoic Era
  5. Unconformity
  1. a The era of the Geologic Time Scale when life first appeared in the oceans. It came after Precambrian Time.
  2. b The next dense layer of the Earth that surrounds the inner core. It's made of a liquid ball of iron.
  3. c When two plates move away from each other. They cause sea-floor spreading, such as the Mid Atlantic Ridge.
  4. d A gap in a rock layer. It reduces scientists understanding of Earth's history because it's a missing piece of information.
  5. e An underwater mountain chain in the Atlantic Ocean caused by sea-floor spreading.

5 Multiple choice questions

  1. Determining the actual age in years of an object ("Exact").
  2. The constant rising and cooling of magma in the Earth's mantle. The heat from the inner core is what causes this motion. They cause plate movement in earth's crust.
  3. When two continental plates move towards each other. They cause mountains.
  4. When two plates slide past each other. They cause earthquakes.
  5. When two plates move towards each other, but the dense oceanic crust sinks under the continental crust. They cause volcanoes.

5 True/False questions

  1. Index FossilA fossil embedded in a rock layer. The age of the rock layer is the same age as the fossils embedded in it.


  2. Precambrian TimeThe section of the Geologic Time Scale that makes up 90% of Earth's History. No life existed at that time.


  3. CrustThe LEAST dense layer of the Earth. It is where life exists and is made up of continental and oceanic crust.


  4. Geologic Time ScaleChanges in earth's land, such as mountains, volcanoes, and earthquakes.


  5. AdaptationThe gradual change in a species over time.