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science 6th grade > section 1 > Flashcards

section 1 Flashcards

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Biology 101 flashcards
1
Q

a process that states that geologic processes that occurred in the past can be explained by current geologic processes

A

uniformitariansim

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2
Q

a process that states that geologic change occurs suddenly

A

catastrophism

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3
Q

the scientific study of fossils

A

paleontology

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4
Q

who wrote the theory of the earth

A

James Hutton

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5
Q

principles of geology

A

Lyell

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6
Q

a scientist who studies fossils

A

paleontologist

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7
Q

scientists who study fossils of plants

A

paleobotanist

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8
Q

a fossilized mark that is formed in soft sediment by the movement of an animal

A

trace fossil

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9
Q

a mark or cavity made in sedimentary surface by a shell or other body

A

mold

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10
Q

a type of fossil that forms when sediments fill in the cavity left by a decomposed organism

A

cast

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11
Q

a fossil that is found in the rock layers of only one geologic age and that is used to establish the age of the rock layers

A

index fossil

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12
Q

hardened tree sap `

A

amber

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13
Q

is a process in which minerals replace an organism’s tissue

A

petrification

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14
Q

sticky tar

A

aspalt

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15
Q

animal dung

A

corprolite

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16
Q

lived between 230 and 208 million years ago

A

tropites

17
Q

are approximately 400 million years

A

phacops

18
Q

the standard method used to divide the earth’s long natural history into manageable parts

A

geologic time scale

19
Q

the largest division of geologic time

A

eon

20
Q

a unit of geologic time that includes two or more periods

A

era

21
Q

a unit of geologic time time into which eras are divided

A

period

22
Q

a subdivision of geologic period

A

epoch

23
Q

the death of every member of a species

A

extinction

24
Q

earth’s age

A

4.6 billion years

25
Q

The rock and fossil record mainly represents the Phanerozoic eon, which is the eon we live in

A

Phanerozoic eon

26
Q

The first organisms with well- developed cells appeared during this eon

A

Proterozoic eon

27
Q

The earliest known rocks on earth formed from this period

A

Archean eon

28
Q

The only rocks that scientists have found from this eon are meteorites and rocks from the moon

A

Hadean eon

29
Q

It is the first era represented well by fossils. Marine life flourished oceans became home to diversity of life

A

Paleozoic era

30
Q

the age of reptiles, reptiles dominated birds appeared late in the Mesozoic era

A

Mesozoic era

31
Q

the age of mammals where mammals had to compete with dinosaurs and other animals for food and habitat.

A

Cenozoic era

science 6th grade (9 decks)

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