Researching Topics Research greenhouse gases to determine how they are produced. Then, write a brief essay that outlines how they can be reduced.

What are some of the possible effects of global warming?

Identify three factors that influence microclimates.

Making Calculations From 1970 to 2005 , nitrogen-oxide, $\mathrm{NO}_x$, emissions in the United States decreased from about $26.9$ million to about $19.0$ million tons per year. By what percentage did $\mathrm{NO}_{\mathrm{x}}$ emissions decrease over these years?

Use the following terms to create a concept map: fossil, ice cores, climate, polar climate, climatologist, steppe, temperature range, tropical climate, middle-latitude climate, and savanna.

Use each of the following terms in a separate sentence.

microclimate

How would global climate be affected if Earth were not tilted on its axis?

Explain why climates cannot be classified only by latitude.

Which is the correct sequence of developmental stages for blowflies? (a) egg, larva, pupa, adult (b) egg, second instar, third instar, pupa, adult (c) egg, pupa, maggot, adult (d) first instar, second instar, third instar, pupa, adult

Explain why the vegetation in areas that have a tundra climate is sparse even though these areas receive enough precipitation to support plant life.

A ladder 25 feet long is leaning against the wall of a house. The base of the ladder is pulled away from the wall at a rate of 2 feet per second. How fast is the top of the ladder moving down the wall when its base is 7 feet, 15 feet, and 24 feet from the wall?

Which represents the normal sequence of decomposition? (a) fresh, active decay, dry decay, bloated, advanced decay (b) bloated, advanced decay, active decay, dry decay, fresh (c) fresh, dry decay, bloated, active decay, advanced decay (d) fresh, bloated, active decay, advanced decay, dry decay

For each question, write on a separate sheet of paper the letter of the correct answer.

Which of the following statements best describes the EI Niño-Southern Oscillation?

F. a change in global wind patterns that occurs in the Southern Hemisphere

G. a warming of surface waters in the eastern Pacific due to the effects of changing wind patterns on ocean currents near the equator

H. a cooling of surface waters in the eastern Pacific due to the effects of changing wind patterns on ocean currents near the equator

I. a global wind and precipitation belt between $20^{\circ} \mathrm{N}$ and $30^{\circ} \mathrm{N}$ latitude

Describe how orbital changes may affect climate.