Ch 21 Test

The greenhouse effect is best described as

• solely an increase in Earth's suface temperature
• a natural warming effect of the atmosphere
• a resulst of global warming
• any short-term change in climate

What is the trend in the data for atmospheric pollutants since 1970?

• emissions have generally decreased since 1970
• emissions have generally increased since 1970
• emissions have have not changed since 1970

Which type of emissions is the most abundant primary pollutant?

• nitrogen oxides
• Carbon monoxide
• volatile organics
• transportation

Antarctica's temperatures were similar to the temperatures there today---

• about 1500,000 years ago
• about 130,000 years ago
• about 50,000 years ago
• about 25,000 years ago

Which part of the temperature graph shows the global warming trend discussed in the chapter?

• the time from about 170.000 to 140,000 years ago
• the time from about 120,000 to 100,000 years ago
• the time from about 70,000 to 60,000 years ago
• the time from about 100 years ago to the present

Recent global climate change appears to be the result of

• changes in global wind patterns
• a decease in the greenhouse effect
• increases in greenhouses gases in the air
• changes in Earth's revolution around the sun

Melting ice caps can result in which of the following?

• a rise in sea-level
• a fall in sea level
• a colder temperature
• less precipitation

Along with temperatures increasing during global warming, what else would be effected?

• weather patterns
• ocean currents
• wind direction
• cloud formation

What was the cause of the "Little Ice Age" in Europe during the 1600s?

• volcanic ash blocking out the sun
• low number of sunspots
• the tilt of Earth's axis
• changes in ocean circulation

The two most important elements of climate are

• elevation and temperature
• weather and elevation
• temperature and precipitation
• precipitation and global winds