Exam 19: Global Change in the Earth System

Cyclical global change includes the formation of core,mantle,and crust from a homogeneous mixture,a state to which one day Earth will return.

The factors that affect Earth's long-term climate are different from those that affect climate on shorter time scales.

During most of the Mesozoic,Earth was ____________.

Uplifted areas are subjected to weathering and erosion at the surface; this provides an example of ____________.

Which of the following types of global change is not part of a cycle of change,and thus irreversible?

Which of the following processes releases carbon dioxide to the atmosphere?

The presence of liquid water on Earth's surface is ____________.

Which of the following processes removes carbon dioxide from the atmosphere?

A newspaper editorial columnist this week writes a scathing attack on the scientific consensus concerning global warming.His position is that global warming is not occurring,and his supporting evidence is the fact that Sheboygan,Wisconsin,had a record low temperature (in 150 years of record keeping)on February 6 last winter.Which statement(s)about the editorial is/are correct?

Which of the following is an important long-term (acting over spans of tens of millions of years)factor in global climate change.

A crater discovered in the Yucatan peninsula in Mexico appears to be the right age to be a result of an impact which brought about the extinction of numerous species at the end of the ____________ period.

Which of the following processes may be responsible for short-term cooling,yet in the long term favors warm,greenhouse climate?

All changes within the Earth system are unidirectional and cannot be reversed.

Pollen has changed over time through evolution,but the pollen of individual species cannot be used to interpret ancient environments because most species inhabit all environments.

Nearly all biological and chemical systems on Earth are disconnected and are best studied in mutual isolation.

The hole in the ozone layer has been brought about by anthropogenic emissions of ____________.

Currently,global warming appears to be most strongly affecting the climate and wildlife of ____________ regions.

An increase through time in the proportion of heavy oxygen ( ) in a sequence of carbonate sediments implies ____________.

With the increased amount of information that has been discovered in recent years,scientists have become increasingly certain that ____________.

Due to global warming,the Earth is now warmer than it ever has been in geologic history.