Chapter 9 Science Review

If you had a question where to find trilobite fossils would you ask a meteorologist or a paleontologist?

• Paleontologists because they study fossils and meteorologists study weather

• A meteorologist

• A fossilologist

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Why are superposition and lateral continuity useful ideas in interpreting how the Grand Canyon formed?

• The grand canyon has many different layers visible all throughout showing superpositions. It also shows lateral continuity because if you compare rock layers on one side of the canyon it would match up to the other side.

• They aren't useful ideas

• The Grand Canyon is not identical and has random striped lines

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An inclusion is...

• younger than the surrounding rock

• the same age as the surrounding rock

• older than the surrounding rock

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Due to original horizontality, layers go sediment form in horizontal layers. However sometimes these layers are found in there positions. What kinds of events might cause layers of rock to change positions?

• People walking on top of the rocks

• Earthquakes, tornadoes, most natural disasters

• Heavy loads

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How do scientist use the ideas of faunal succession to identify how long ago different animals lived?

• how unstable atoms lose energy and matter over time

• by determining the age of something in years

• by determining the age of something in years

  By looking at the layers of rock formation and seeing how far down something is 

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Uranium decays into an element called...

• Carbon

• Nitrogen

• Oxogen

• Lead

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How might a tree fossil help a scientist understand the climate of certain places millions of years ago?

• By counting the. rings

• By seeing how dark the bark is compared to todays trees

• It can tell you how much water was available by looking at the ring and seeing how wide or narrow the rings are together

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You notice that a tree cross-section has a very wide ring that occurred in 1985 and a very narrow tree ring that occurred in 1992. What can you infer about the tree's environment in those years?

• Both years had a lot of sun and a lot of rainfall

• In 1985, the tree had a lot of rainfall but in 1992 there was most likely a drought

• 1985 had little rain and grew very little and 1992 had a lot of rain and grew a lot

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Lystrosaurus fossils are found in Antarctica and Africa. How is it possible for fossils of this organism to be found in both places?

• Due to Pangea all the continents were next to each other near the south pole but over time moved to where they are today

• It isn't possible

• The animal can swim across the ocean to the different continents

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Is measuring the amount oof Uranium-238 in a fossil to determine its age relative or absolute dating?

• Relatives

• Absolute Dating

• Relative Dation

• Absolutely

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