Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A2 earth life and climate > milankovich cycles > Flashcards

milankovich cycles Flashcards

1
Q

Eccentricity how many years?

A

100,000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

eccentricity what is it?

A

changing from eliptical to circular orbit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is term for point when earth is furthest from the sun

A

aphelion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is term for when earth is closest to the sun

A

perhelion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is present day eccentricity of earth orbit

A

6%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

is present day eccentricity high?

A

no, almost minimum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is maximum eccentricity?

A

between 20-30%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is obliquity

A

the tilt of the earths axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

how long is an obliquity cycle?

A

41,000 years

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

how many can the tilt change

A

3 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what does a small tilt mean for climate?

A

Ice sheet growth due to warm winters bringing moisture and snowfall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is precession?

A

a combination of obliquity and eccentricity (wobbling)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is current tilt of earth (obliquity)

A

23.5 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is current tilt of earth (obliquity)

A

23.5 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

how long are precession cycles

A

19,000 or 23,000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what are the effects of precession

A

greater seasonal contrasts

17
Q

which milankovich cycle goes in 41,000 yrs

A

obliquity

18
Q

which cycle goes in 19,000 or 23,000 years

A

precession

19
Q

which cycle goes in 100,000 years

A

eccentricity

20
Q

which cycle is to do with tilt

A

obliquity

21
Q

which cycle is to do with tilt and orbit

A

precession

22
Q

which cycle is to do with orbit

A

eccentricity

23
Q

where can evidence be found in rocks

A

Blue Lias

Kimmeridge Clay

24
Q

What cycle is shown in Blue Lias

A

Obliquity

25
Q

what cycle is identifies in Kimmeridge Clay

A

eccentricity

26
Q

how is Obliquity shown in Blue Lias

A

the beds alternate regularly from limestone to clay every 41,000 years

27
Q

why is the limestone and clay in blue lias signigficant

A

it shows 41,000 year alteration between clay rich sea and lime producing sea

A2 earth life and climate (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions