Evolution and the Geological Time Scale

Fossils provide evidence of __________.

• how life and the environment has remained stable over time

• how the climate and weather has remained stable over time

• how life and the environmental conditions have changed over time

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NGSS.MS-LS4-1

Scientists can estimate the ages of rock if they contain certain __________.

• carbons

• sediments

• index fossils

• minerals

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NGSS.HS-LS4-1

Some scientists believe that life on Earth began about 3.5 billion years ago. What do they base this belief on?

• the thickness of the mantle

• the time it takes to orbit the Earth

• the fossil record

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NGSS.MS-LS4-1

Fossils such as __________ provide evidence of past life and environmental conditions

• rocks and sand

• footprints and shells

• rare minerals

• . hieroglyphics

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

In what era did the first land plants appear?

• Silurian

• Mesozoic

• Paleozoic

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NGSS.HS-LS4-2

How can fossils tell us about Earth's past?

• Fossils give clues about environmental changes where the organism lived.

• Fossils can be used to date the time period of rocks and rock layers when the organism lived.

• Fossils can give clues of changes in the organism's body structure over time.

• All of the above are true.

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

As the body plan of the fish progressed, the first sharks appeared during the Silurian Period. The skeletons of these ancient fish are hard to find in fossil form because their skeletons are composed of _____________.

• calcium

• bone

• cartilage

• muscle

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NGSS.MS-LS4-1

Fossils after the Precambrian period show evidence of legs and eyes, indicating that the presence of predators stimulated the beginning of animal diversity

• True

• False

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

Which type of fossil preservation is shown above?

• carbon film

• trace fossil

• original remains

• perminerailzed remains

A change over time, the process by which modern organisms have descended from ancient organisms

• evolution

• embryo

• homologous structure

• fossil record

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NGSS.MS-LS4-1

NGSS.MS-LS4-2