**PM CH 3 Quiz**

Similar rock formations have been discovered in the U.S. and Portugal. These rock formations formed at the same time and are made of the same types of rocks. What could explain how these rocks got so far apart?

• The US and Portugal are parts of different plates. The plates floated away from each other across the ocean

• The US and Portugal are parts of different plates. The plates were sometimes pushed far apart by earthquakes

• The US and Portugal are parts of different plates. The plates slowly moved apart as new plates from underneath got added between them

• The US and Portugal are parts of different plates. The plates slowly moved far apart as soft, solid rock from underneath got added to the edges of the plates

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Fossil remains of Lystrosaurus (an extinct four-legged animal) have been discovered in India and South Africa. When they were alive, all the Lystrosaurus lived together on land, and they could not swim. However, now there is an ocean between the Lystrosaurus fossils. What could explain how these fossils got so far apart?

• India and South Africa are parts of different plates. The plates slowly moved far apart as soft, solid rock from underneath got added to the edges of the plates over millions of years.

• India and South Africa are parts of different plates. The plates floated away from each other across the ocean.

• India and South Africa are parts of different plates. Earthquakes caused the plates to slowly move apart as new plates from underneath got added between them over millions of years.

• India and South Africa were part of the same plate millions of years ago. The plate was cracked into two and pushed far apart by earthquakes.

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True or False: Plates are sometimes pushed far apart by earthquakes.

• True. This is how the continents got so far apart.

• True. This is how trenches are formed.

• False. They are only pushed a little bit by earthquakes.

• False. Earthquakes don't push the plates.

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The Atlantic Ocean is getting smaller.

• True

• False

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How did Alfred Wegener know about Continental drift

• Fossil of the same plants and animals were found on different continents.

• Rocks and earthquakes are the same on all continents.

• Maps showed him what the continents looked like millions of years ago.

• The types of water and buildings found on North America were similar to those found in Europe, but not Africa.

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If we went back 200 million years, where would the continents be in this picture?

• The continents would be in the same place
• The continents would all be together in one giant continent
• The continents would be close together but not touching
• The continents would be farther apart than they are in the picture

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In which time period are we currently living?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Which era was the longest, taking up 88% of geologic time?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

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A trench is...

• A long, deep indentation in the ocean floor formed when two plates move together

• An extinct reptile that lived about 300 million years ago

• An underwater mountain range formed at divergent boundaries

• the layer of soft, solid rock underneath Earth's plates

Which of the following is TRUE about trenches?

• Trenches are shaped like a mountain.

• Trenches are formed at divergent boundaries.

• Trenches are found at a convergent boundary.

• Trenches are made when soft, solid rock cools down and hardens.