Fossils

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 the environment has changed but life has remained stable over time

• how life and the environmental conditions have changed over time

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

• footprints and shells

• rocks and sand

• hieroglyphics

• rare minerals

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Scientists frequently use all of the following to support the theory that organisms change over time EXCEPT

• similarities in DNA

• similarities in early development

• similarities number of mates

• similarities in body structure

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Some scientists base their belief that life on Earth began about 3.5 billion years ago on ____________

• the fossil record

• the distance from the sun to the Earth

• the time it takes to orbit the Earth

• the thickness of the mantle

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Scientists sometimes find trace fossils that are not the organism itself, but something left behind by an organism. Preserved feces (dung) would tell them about an organisms _________

• age

• sleeping habits

• diet

• body covering

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Scientists can estimate the ages of rock if they contain certain ______________

• sediments

• carbons

• minerals

• index fossils

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Why is studying fossils important?

• to provide information about current life forms and environmental conditions

• to provide information about how previous life forms would exist in current conditions

• to provide information about how life and environmental conditions may have changed

• to provide information about how current life forms would exist in previous conditions

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What type of scientist study fossils to discover how life on Earth has changed or evolved over time?

• zoologist

• archeologist

• paleontologist

• biologist

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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.

• It allows them to see that there is no relationship between the past and today.

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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 are true.

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