Evolution and the Geological Time Scale

Approximately how old is the Earth?

• 4.6 billion years old

• 4.6 million years old

• 5 billion years old

• 5 million years old

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History of life as documented by all fossils, preserved in sedimentary rock strata is known as the _________________________.

• Rock record

• Fossil record

• Geology record

• Petrified record

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Preserved remains of plant and animals from the remote past are called _______________.

• Rocks

• Dinosaurs

• Strata

• Fossils

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The end of life for a group of organisms, usually a species, is called a(n) ________________.

• Extinction

• Retirement

• Endangerment

• Catastrophe

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Claire would like to show that fossils provide evidence of how old Earth is. She knows that the fossil record can be used to deduce geologic time scales and present a record of Earth’s history. Which fossils match the Precambrian time period^?

• flowers and dinosaurs

• bacteria and primitive marine plants

• coral reefs and amphibians

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London is studying the geological time scale. Which era would London find Humans in?

• Precambrian

• Cenozoic

• Paleozoic

• Mesozoic

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Over millions of years, animals have evolved in shape and size. The nautiloid is one of those animals. Which of the following is a descendant of the nautiloid found during the Cambrian period?

• bryozoans

• nautilus

• trilobites

• arthropods

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When scientists analyze the fossil record, they find organisms that are similar to some organisms of today with noticeable changes. How does this help scientists to interpret the past?

• It doesn't help them at all.

• It allows them to see how organisms have changed over time

• It allows them to see how organisms have remained the same over time

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According to the diagram, which of the following statements is true?

• Fossil C and D are the same age.

• Fossil C is younger than Fossil D

• Fossil B is youngest

• Fossil A is oldest.

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Fossil body parts of an animal and its location of excavation confirm that these animal species underwent minimal adaptations from one period to the next.

• False

• True

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