History of Earth

During the Cenozoic era ___ (check all that apply)

• mammals became the dominant land animals

• life forms grew more complex

• Pangea broke up

• Continents moved to their current positions

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NGSS.MS-ESS2-3

NGSS.MS-LS4-1

________ fossils are fossils of organisms that only existed for a short period of time.

Which layer formed first?

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

Tags

NGSS.MS-ESS1-4

Looking at this image, how would you describe the change in species through the eras?

• At the beginning there were complex species that later evolved to microorganisms.

• There was no change

• At the beginning there were no species to microorganisms, then to complex species.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Which period is closest to present day?

• Cambrian

• Devonian

• Triassic

• Tertiary

What is the relative age of a rock?

• The age determined by the things around it.

• The age of an igneous rock.

• The age determined by radioactive dating.

• The time it takes for 1/2 of the radioactive atoms to decay in an element.

Tags

NGSS.MS-ESS1-4

What are index Fossils?

• The mineralized remains of organisms and the rock layers in which they are found

• Fossils of organisms that were abundant and went extinct (so they existed for a limited time) and are only found in one specific rock layer. They are used to identify a geologic period.

• The mineralized remains of organisms and the rock layers in which they are found. Soft tissues are extremely uncommon.

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

What does the picture indicate?

• an igneous intrusion

• an angular unconformity

• an extinction event

• an explosion of different organisms

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Juan studies the diagram representing three sedimentary layers in a rock sequence, as shown. The rock layers have not experienced any folding or faulting. Juan claims that layer X formed between 498.5 million and 488.3 million years ago. Use evidence from the diagram to explain whether Juan’s claim is supported

• Juan is correct with relative dating scientists can find an estimated time for when the trilobites were. Layer X trilobite was alive when the trilobite was in Layer Z.

• Juan's claim is not correct because the trilobites are on two different rock layers, making them not live in the same time.

• Luan's claim is supported because there is only 1 rock layer in between the trilobite fossils. One rock layer is not enough layers to show they are from two different eras.

Tags

NGSS.MS-ESS1-4

Which sentence best describes the process of relative dating?

• Younger fossils are on top of older fossils.

• Older fossils are on top of younger fossils.

• Radioactive elements help determine the age of the fossil.

• Fossils are dated by comparing them with living descendants.

Tags

NGSS.MS-ESS1-4