Exam 19: Global Change in the Earth System

How are pollen species used to interpret ancient environments?

The climate on Earth has changed frequently,with at least ________ times in which Earth experienced icehouse conditions.

The evolution of life takes place ________,while the mass extinction of life takes place ________.

The change in organisms over geologic history is known as the ________.

During most of the Mesozoic Era,Earth was ________.

Which geologic event is NOT suspected as a source of major climate change or mass-extinction events?

What is the difference between weather and climate?

A ________ change will only occur one time.

Toxic chemicals dumped into a river are an example of ________.

The amount of solar energy reflected by a surface is known as ________.

There have been at least three or four times in Earth's history when ________ formed.

Which greenhouse gases play the most significant role in influencing changes in global atmospheric temperature?

The ________ cycle describes how water moves between reservoirs on Earth.

________ is a change in atmospheric conditions over minutes to days,whereas ________ is the average of conditions over years to decades.

Using the graph below,when was the first period of global cooling?