Paragraph: (Science-textbook/science-g4-95.txt)
Sent 1: Rock layers extend laterally, or out to the sides.
Sent 2: They may cover very large areas.
Sent 3: This is especially true if they formed at the bottom of ancient seas.
Sent 4: Seas are very large areas of water.
Sent 5: Over time, sediment builds up on the seabed.
Sent 6: They will be covered with the same types of material.
Sent 7: As rocks form out of this sediment it will all be the same type.
Sent 8: The rocks may be forced up above the water as Earths plates move.
Sent 9: Rivers may eventually run across this area.
Sent 10: The river will cut into the rock and erode it away.
Sent 11: The layers of exposed rock on either side of the river will still match up.
Sent 12: Look at the Grand Canyon in Figure 2.27.
Sent 13: Its a good example of lateral continuity.
Sent 14: You can clearly see the same rock layers on opposite sides of the canyon.
Sent 15: The matching rock layers were deposited at the same time.
Sent 16: They are the same age.

Question: What is the Grand Canyon a good example of? (false/challenge)

lateral continuity
Ancient Seas
Rivers
seas

Question: When rocks are forced up above the water as Earth plates move what may eventually happen? (false/challenge)

Rivers may eventually run across this area
rivers will erode the rock away
The river will cut into the rock
noise will come
people will settle on the rock

Question: When are rock layers more likely to cover large areas? (false/additional)

when they are formed at the bottom of ancient seas
If they formed at the bottom of seas
when there is nothing to impede their growth
As rocks form
When rivers run across the area
when rocks fall

Last updated: Mon Apr 16 04:55:33 EDT 2018
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