Unit 4, Lesson 1- Exploration 1- Fossils & Sedimentary Rock

Put the layers in order from oldest to youngest/newest

• conglomerate

• limestone

• mudstone

• siltstone

• sandstone

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Most fossils form from

• the muscles and organs of the animals body

• the bones, horns and teeth of an animal

• the skin of an animal

• the fur of an animal

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Dinosaur tracks preserved in rock are an example of

• trace fossils

• true form fossils

• mold fossils

• cast fossils

You find shark tooth and fish fossils in an area that is now a forrest. What can you infer about the history of this place?

• The area was once a valley
• The area was once a desert
• The area was once covered in ice
• The area was once an ocean

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Which is not true about fossils?

• fossils are only animals remains
• fossils show the history of Earth
• Fossils can be found in sedimentary rock layers
• fossils can be traces of organisms footprints and body structure

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NGSS.MS-LS4-2

A scientist is studying trace fossils of an early mammal. Which type of information can be learned from studying trace fossils?

• how many teeth the mammal had

• he structure of the mammal’s skeleton

• information about the behavior of the mammal

• how the mammal is genetically related to modern mammals

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Which of the following would make the best index fossil?

• An insect that only existed in one small forest for about 100 million years.

• An aquatic animal that existed all over the world for about 10 million years.

• A single-celled organism that lived in a widespread region for about 10 million years.

• A plant species that lived in a specific geographic region for about 5 million years.

Which is NOT a factor that affects fossilization? 

• age of the organism
• hard or soft body parts
• predators destroying the body
• body decay due to natural elements

An archaeologist is digging through the rock layers and finds an index fossil in Layer B.

This fossil will help her do which of the following?

• determine the minerals found in Layer B

• determine the age of the rock in Layer B

• determine the type of rock in Layer B

• determine the thickness of Layer B

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An organism is UNLIKELY to be preserved as a fossil if

• it has a shell
• it has a skeleton
• it is a soft-bodied creature
• it is buried soon after death

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