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Science > Ch4 > Flashcards

Ch4 Flashcards

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Biology 101 flashcards
0
Q

A Hollow area in sediment in the shape of an organism or part of an organisms

A

Mold

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1
Q

Preserved remains or traces of living things

A

Fossils

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2
Q

A solid copy of the shape of an organism

A

Cast

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3
Q

Fossils in which minerals replace all of an organism or a part such as a dinosaur bone

A

Petrified fossils

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4
Q

Extremely thin coating of carbon on rock

A

Carbon film

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5
Q

Provides evidence of the activities of ancient organisms

A

Trace fossils

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6
Q

Scientists who study fossils are called

A

Paleontologist

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7
Q

The change in living things over time

A

Evolution

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8
Q

No longer exists and will never again live on earth

A

Extinct

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9
Q

A rock is it’s age compared to the ages of other rocks

A

Relative age

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10
Q

A rock is the number of years that have passed since the rock formed

A

Absolute age

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11
Q

Determine the relative age of sedimentary rock layers

A

Law of superstition

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12
Q

Lava that hardens on the surface and forms igneous rock

A

Extrusive

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13
Q

Magma cools and hardens into a mass of igneous rock

A

Intrusive

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14
Q

A break in earths crust

A

Fault

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15
Q

A fossil must be widely distributed and represent an organism that excited for a geologically short period of time

A

Index fossil

16
Q

A gap in the geologic record

A

In conformity

17
Q

These elements release particles and energy in this process

A

Radioactive decay

18
Q

A radioactive elements is the time it takes for half of the radioactive atoms to decay

A

Half life

19
Q

A record of the geologic events and the evolution of life forms as shown in the fossil record

A

Geologic time scale

20
Q

Time and present are split into three long units of time called

A

Eras

21
Q

Eras subdivides into units of geologic time called

A

Periods

22
Q

The key principles that guide scientists when the make inferences about earths past is the principle of

A

Uniformitarianism

Science (24 decks)

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