Unit 6 Fossils

Plants and animals become fossilized in several different ways. Which object fossilized most recently?

• A

• B

• C

• D

Which fossil is the youngest?

• trilobite

• clamshell

• dinosaur bone

• cow skull

Which period of geologic time is also known as the age of the dinosaurs?

• A

• B

• C

• D

Which type of fossil is approximately 438 million years old?

• X

• diamond

• rectangle

• star

While the class was working, Susan traded the + card for a card showing a What did this do to her results?

• They now show a mass extinction at the 5th card

• he was not able to place the new card in the stack.

• It caused the entire stack to become out of order.

• She was able to show that the : became extinct.

Chantal visited the La Brea tar pits in California with her family last summer. She learned that the plants that lived in the area 40,000 years ago were not much different from those that live in and around Los Angeles today. What does this information tell scientists?

• None of the plants has changed since that time.

• The animals that lived then are the same as now.

• The climate is not much different from what it was back then.

• Yearly rainfall has increased steadily

How could you demonstrate relative dating using a stack of newspapers?

• by identifying the age of each paper by the date listed at the top of each one

• by noting the dates of the top and bottom papers

• by describing the placement of the papers within the entire stack

• by comparing the stack of papers to a stack from a different newspaper

What does the fossil record refer to?

• the fossils in the rock layers on Earth

• the fossils in a layer being studied

• an encyclopedia of fossil photos

• a recording of fossil names

What may have caused 75% of Earth’s organisms to become extinct approximately 65 million years ago?

• The temperature became too warm.

• a meteorite impact

• disease

• glaciers

Kyle found a rock and used a hammer to split it open. One half of the rock had a raised shape of a shell. The other had an impression of the shell. What type of fossil did Kyle find?

• a shell preserved in amber

• a mold and a cast of a shell

• a shell frozen in rock

• a trace fossil of a seashell