4043613
Description
Mind Map by Oliver Hall, updated more than 1 year ago
|
Created by Oliver Hall
over 8 years ago
|
|
Snowball Earth
- Evidence
- Ancient glaciers were
discovered inside the
tropics.
- The sea bed here
contains sediemtary
structures that can only
be created by glaciers.
- The sea bed here
contains sediemtary
structures that can only
be created by glaciers.
- Ancient glaciers were
discovered inside the
tropics.
- Doubted because of
the runaway freeze
theory.
- This states that a certain amount of the earth was
covered in ice, high albedos would cause the ice to
constantly multiply, meaning that there was no
way back from snowball earth.
- Albedos rate the reflectiveness of
surfaces in a percentages, snow has
one of the highest albedos at 85%.
- This problem was avoided when it
was realised that increased CO2
levels had led to the demise of
snowball earth.
- Increased amounts of
volcano eruptions mean that
huge amounts of CO2 entered
the atmosphere, creating an
ultra greenhouse effect.
- Carbon from the sea sediment was
also released to increase CO2
levels.
- Increased amounts of
volcano eruptions mean that
huge amounts of CO2 entered
the atmosphere, creating an
ultra greenhouse effect.
- Albedos rate the reflectiveness of
surfaces in a percentages, snow has
one of the highest albedos at 85%.
- This states that a certain amount of the earth was
covered in ice, high albedos would cause the ice to
constantly multiply, meaning that there was no
way back from snowball earth.
Want to create your own Mind Maps for free with GoConqr? Learn more.