Paleoclimate

Front

When CO₂ levels were low, temperatures were ______ and Earth was _____________.

Back

cooler; in an ice age (glacial period)

Front

When CO₂ levels were high, temperatures were ______ and Earth was _____________.

Back

warmer; warming (interglacial period)

Front

Oxygen isotopes are used to measure past temperatures. Isotopes have different numbers of...

Back

neutrons

Front

A greater amount of ¹⁸O in an ice core sample means temperatures were _________ because there was ________ evaporation.

Back

warmer; more

Front

A greater amount of ¹⁸O in a foram ocean sediment sample means temperatures were _________ because there was ________ evaporation.

Back

colder; less

Front

How does the rate of modern warming compare to other periods?

Back

It is faster than the rate in the Cretaceous and PETM periods.

Front

What is the primary cause of modern warming?

Back

fossil fuel burning

Front

How does a slow rate of warming impact the biosphere?

Back

Nearly all creatures have time to adapt or migrate.

Front

Which period has the fastest rate of warming in regards to changing climate? Options: Cretaceous Period, PETM Period, Modern Warming

Back

Modern Warming