5.9D What Happened Before?

How do scientists learn about dinosaurs?

• by studying fossils

• by reading about them

• by watching movies

• by looking at pictures

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What is the correct order of the rock layers from oldest to youngest?

• F, E, C, B, A, D
• A, B, C, D, E, F
• F, E, D, C, B, A
• D, F, E, C, B, A

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Which layer formed first?

• Rock Layer W
• Rock Layer X
• Rock Layer Y
• Rock Layer Z

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Fossils can provide evidence of how life has changed over time, how Earth's surface has changed, and clues about what past environments were like.

• True
• False

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The diagram above shows layers of sedimentary rock in the Earth’s crust. In which layer of rock should a scientist expect to find the oldest fossils?

• Layer M

• Layer N

• Layer O

• Layer P

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NGSS.4-ESS1-1

Fossil trees were discovered in a sedimentary rock layer. In the rock layer below are fossils of clams, similar to clams that are currently found on the shores of the Gulf of Mexico. Based on this evidence, we could conclude that the area where the fossils were discovered had what sequence of climates in the past?

• Beach, followed by a forest

• Rocky and dry, then very moist

• Forest, and later a mountain

• Very cold area, then much warmer

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An ancient fossil of a fish was found in a dry area. What does this suggest about how this area used to look?

• The land was a dense forest

• The land was a dry dessert

• There was once water in the area

• The fossil was moved because there could not have been water there in the past

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The picture shows a rock found in Texas. Which of the following best illustrates that the rock was formed from ocean sediments?

• The number of fossils in the rock

• The size of the fossils in the rock

• The place where the rock was found

• The type of fossils in the rock

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This rock contains fossils of water plants and shells. What does this tell us about the rock?

• The rock contains many living things

• The rock needs to be cleaned with water

• The rock is heavier than most rocks

• The rock was once at the bottom of the sea

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NGSS.4-ESS1-1

This table gives information on different fossils. According to the information on the table, finding which fossil in a region would lead to the conclusion that the area was, long ago, covered with trees?

• 
• 
• 
• 

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