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EAS 205 > Intro > Flashcards

Intro Flashcards

1
Q

What are the 6 major extinctions? Which one is underway?

A
  1. Late Ordovician
  2. Late Devonian
  3. Late Permian
  4. Late Triassic
  5. Late Cretaceous
  6. Holocene Mass extinction - underway
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2
Q

What is an observation?

A

a body of measured data

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3
Q

What is a hypothesis?

A

formed to explain observations or data

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4
Q

What is a theory?

A

formed as an ACCEPTED explanation for an observation or data set

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5
Q

TRUE or FALSE: modern geology is an observational science.

A

FALSE –> it is now an analytical science (combines observations and lab activites)

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6
Q

What units of time are commonly used in geology?

A

thousands, millions, or billions of years

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7
Q

Did the solar system form before or after the universe?

A

after the universe

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8
Q

How long does it take the earth to take one complete trip around the Sun?

A

one year

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9
Q

What is the tilt angle of the Earth?

A

23.5 degrees from vertical

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10
Q

What are the implications of the tilt of the Earth for the different hemispheres?

A

Different seasons in different hemispheres at different times of the year

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11
Q

The Earth is the ________ planet from the Su. (Fill in the blank)

a) 1st
b) 2nd
c) 3rd
d) 4th

A

c) 3rd

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12
Q

How old is the Earth?

A

over 4.5 billion years old

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13
Q

What is the mean temperature of the Earth?

A

15 degrees celcius (not too hot or too cold)

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14
Q

How many planets are there in our Solar System?

A

8

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15
Q

The 4 inner planets (closest to the Sun) are:

a) gaseous
b) rocky and metallic

A

b) rocky and metallic

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16
Q

The 4 outer planets (furthest from the Sun) are:

a) gaseous
b) rocky and metallic

A

gaseous

17
Q

Which planet is no longer deemed a planet? How far is it from the Sun?

A

Pluto, ninth planet form the Sun

18
Q

How old is the universe?

A

around 14 billion years old

19
Q

How do gas giant planets form?

A

when a young star is surrounded by a dense disk of both gas and dust, gas giant planet can form

20
Q

What 2 characteristics of a planet determine how close it forms from the Sun?

A

density and composition

EAS 205 (16 decks)

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