Geology Flashcards

0
Q

Invertebrate

A

Has no backbone

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1
Q

Paleozoic Rock

A

Contains fossils of the first plants and animals.

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2
Q

Earth Age

A

4.568 billion years

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3
Q

Cenozoic era

A

The age of animals

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4
Q

Relative Dating

A

How old is something relative to something else

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5
Q

Relative Dating fossils

A

Measured by how deeply buried they are when discovered

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6
Q

Precambrian era

A

Oxygen started by photosynthesis in cells

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7
Q

Geologic time

A

Based on fossil animals and plants

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8
Q

Uranium half life

A

4.5 billion years

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9
Q

Youngest fossils are _______ years old.

A

10,000

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10
Q

Human domain

A

Eukarya

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11
Q

Human kingdom

A

Animalistic

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12
Q

Human phylum

A

Chordata

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13
Q

Human class

A

Mamalia

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14
Q

Human order

A

Primates

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15
Q

Human family

A

Hominid ad

16
Q

Human genus

A

Homo

17
Q

The 3 types of radioactive particles

A

Alpha (largest)
Beta (smaller) can injure humans
Gamma (smallest) high energy can disrupt cells

18
Q

Alpha particles consist of ________

A

2 neutrons and 2 protons

19
Q

Beta particles consist of _________

A

Electrons

20
Q

Gamma rays consist of ________

A

Entirely energy

21
Q

Half-life definition

A

The time it takes for a radioactive substance ( the parent) to lose half its radioactivity (decays to the daughter material)