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Gr. 7 Science > Topics 8-10 > Flashcards

Topics 8-10 Flashcards

1
Q

What are original remains?

A

A type of fossil in which all or part of the organism is preserved

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2
Q

What is a trace fossil?

A

A type of fossil in which evidence of animal activity has been preserved

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3
Q

What is a cavity in rock left when the hard parts of an organism dissolve?

A

Mould

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4
Q

What is produced when sediments fill in the cavity?

A

Cast

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5
Q

On the geologic time scale, what are the three eras?

A

Cenozoic, Mesozoic, Paleozoic

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6
Q

What are oil, natural gas, and coal examples of?

A

Fossil fuels

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7
Q

What was the earliest supercontinent?

A

Rodinia

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8
Q

What can be used to determine the relative age of strata?

A

Index fossil

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9
Q

What are the layers of rock also called?

A

Strata

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10
Q

Radiocarbon dating use carbon as its parent material to find the age of fossils, bones, and wood that are up to how old?

A

50 000 years

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11
Q

For the first billion years of earth’s history, how much fossil evidence was there?

A

Very little

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12
Q

What is bitumen?

A

A heavy, almost solid form of petroleum

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13
Q

What is Oil formed from?

A

Animal & plant remains

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14
Q

What do relative, radiometric, and radiocarbon dating provide information about?

A

The age of strata

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15
Q

Why doesn’t fossil evidence exist for all living organisms?

A

The conditions to form a fossil are very specific

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16
Q

Are radiometric in radiocarbon dating both examples of absolute dating?

A

Yes

17
Q

What are three ways that oil and natural gas can be trapped?

A

Thrust fault, normal fault, reef

18
Q

What is each particle of oil sand coated with?

A

A layer of water and a film of bitumen

19
Q

On the geologic time scale, is Cambrian a period?

A

Yes

20
Q

What type of fossil occurs when an organism is buried under many layers, causing sediment, pressure, and heat to build up and leave a thin film of carbon residue on rock surfaces?

A

Carbonaceous film

Gr. 7 Science (1 decks)

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