Fossils Review Part 1

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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Some scientists believe that life on Earth began about 3.5 billion years ago. What do they base this belief 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. Coprolites are trace fossils. They are preserved feces, or dung, from animals. What part of an organism’s life can this tell scientists about?

• age

• sleeping habits

• diet

• body covering

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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 _______________.

• cartilage
• bone

• muscle

• calcium

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

• index fossils
• sediments

• carbons

• minerals

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Which fossil is the youngest?

• fossil A

• fossil B

• fossil C

• fossils A and B are the same age

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In what era did the first land plants appear?

• Cenozoic

• Mesozoic

• Paleozoic

• Silurian

What is the importance of studying fossils?

• to provide information about current life forms and current environmental conditions

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

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