Unit 7 REVIEW: Climate Change and Natural Resources

Based on the graph below, how many ice ages have there been in the past 420,000 years?

• a. 1
• b. 2
• c. 3
• d. 4

The graph below shows changes in carbon dioxide concentrations in Earth's atmosphere over a 140-year period. Carbon dioxide concentrations are shown in parts per million (ppm). This significant change in CO2 concentration is most likely caused by

• decreased volcanic activity, and is predicted to increase average global temperatures
• increased use of fossil fuels, and is predicted to increase average global temperatures
• decreased cloud cover, and is predicted to decrease average global temperatures
• increased El Niño activity, and is predicted to decrease average global temperatures

A period of colder global temps with glacial expansion across the Earth's surface is called

• a. cooling period
• b. ice age
• c. interglacial period
• d. global warming

What phenomenon naturally warms Earth’s lower atmosphere and surface?

• a. the formation of sunspots
• b. changes in the shape of Earth’s orbit
• c. global warming
• d. the greenhouse effect

During the twentieth century, Earth’s average surface temperature ____.

• a. increased
• b. decreased
• c. stayed the same
• d. fluctuated wildly

Which of the following is an example of human impact on climate changes?

• a. the greenhouse effect
• b. changes in solar output
• c. global warming
• d. changes in the tilt of Earth’s axis

Shoreline erosion and coastal flooding are two consequences of ____.

• a. increased rates of evaporation
• b. a global rise in sea level
• c. volcanic eruptions
• d. the greenhouse effect

Which of the following is NOT a possible consequence of global warming?

• a. more frequent and intense hurricanes
• b. rising sea level
• c. reduction in secondary pollutants
• d. more frequent and intense droughts

Which of the following is a nonrenewable energy resource?

• a. solar
• b. wind
• c. hydroelectric
• d. coal

Energy resources derived from buried, combustible, natural, organic materials are called

• a. geothermal energy sources
• b. fossil fuels
• c. biomass
• d. all of these