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- Multiple ChoicePlease save your changes before editing any questions.
When CO2 levels were low, temperatures were ______ and Earth was _____________.
cooler; in an ice age (glacial period)
cooler; warming (interglacial period)
warmer; in an ice age (glacial period)
warmer; warming (interglacial period)
- Multiple ChoicePlease save your changes before editing any questions.
When CO2 levels were high, temperatures were ______ and Earth was _____________.
cooler; in an ice age (glacial period)
cooler; warming (interglacial period)
warmer; in an ice age (glacial period)
warmer; warming (interglacial period)
- Multiple ChoicePlease save your changes before editing any questions.
Oxygen isotopes are used to measure past temperatures. Isotopes have different numbers of...
protons
neutrons
electrons
- Multiple ChoicePlease save your changes before editing any questions.
A greater amount of 18O in an ice core sample means temperatures were _________ because there was ________ evaporation.
colder; less
colder; more
warmer; less
warmer; more
- Multiple ChoicePlease save your changes before editing any questions.
A greater amount of 18O in a foram ocean sediment sample means temperatures were _________ because there was ________ evaporation.
colder; less
colder; more
warmer; less
warmer; more
- Multiple ChoicePlease save your changes before editing any questions.
How does the rate of modern warming compare to other periods?
It is slower than the rate in the Cretaceous and PETM periods.
It is equal to the rate in the Cretaceous and PETM periods.
It is faster than the rate in the Cretaceous and PETM periods.
- Multiple ChoicePlease save your changes before editing any questions.
What is the primary cause of modern warming?
peat fires
respiration
fossil fuel burning
volcanic eruptions
- Multiple ChoicePlease save your changes before editing any questions.
How does a slow rate of warming impact the biosphere?
Nearly all creatures go extinct.
Nearly all creatures have time to adapt or migrate.
- Multiple ChoicePlease save your changes before editing any questions.
Choose which of the following have occurred due to modern warming. (choose all that are correct)
Ocean acidifcation
Glaciers melting
Poleward migration of many species
Coral bleaching
Extinctions
- Multiple ChoicePlease save your changes before editing any questions.
Which period has the fastest rate of warming in regards to changing climate?
Cretaceous Period
PETM Period
Modern Warming