Question 1

One of the major economic problems in less developed countries is ________.&#10;A) deforestation&#10;B) neglected use of solar energy&#10;C) dependence upon imported oil&#10;D) increased emission of greenhouse gases.

Accepted Answer

Dependence upon imported oil is a significant economic problem for less developed countries because it can lead to trade imbalances, vulnerability to global oil price fluctuations, and limited resources for other critical investments.

Question 2

A balloon is buoyed up with a force equal to the&#10;A) density of the surrounding air&#10;B) atmospheric pressure&#10;C) weight of the balloon and its contents&#10;D) weight of the air it displaces

Accepted Answer

According to Archimedes' principle, an object immersed in a fluid experiences a buoyant force equal to the weight of the fluid it displaces. In the case of a balloon, it displaces air, and the buoyant force it experiences is equal to the weight of the air it displaces. Therefore, the correct choice is D, weight of the air it displaces.

Question 3

Ozone production via automobile emissions ________.&#10;A) is usually associated with photochemical smog&#10;B) can help restore the ozone being depleted in the outer atmosphere&#10;C) is eliminated by appropriate use of catalytic converters&#10;D) will provide overall worldwide reduction in skin cancer

Accepted Answer

Ozone production via automobile emissions is usually associated with photochemical smog, which is harmful to human health and the environment. It is not beneficial in restoring the ozone layer being depleted in the outer atmosphere. Catalytic converters can reduce the emission of ozone precursors, but it is not completely eliminated. The statement about worldwide reduction in skin cancer is not accurate as it is caused by depletion of the ozone layer in the upper atmosphere, not through ozone production from automobile emissions.

Question 4

Which of the following air pollutants is emitted in about equal amounts by stationary and mobile sources?&#10;A) particulates&#10;B) carbon monoxide&#10;C) sulfur dioxides&#10;D) hydrocarbons&#10;E) nitrogen oxides

Accepted Answer

Nitrogen oxides are emitted in nearly equal amounts by stationary sources (such as power plants and industrial facilities) and mobile sources (such as cars and trucks) because they are produced during the combustion of fossil fuels, which is a common process in both types of sources.

Question 5

Your largest personal contribution to global warming in a year comes from ________.&#10;A) use of freon propellants&#10;B) use of air conditioners in your home&#10;C) driving your car&#10;D) cutting down trees&#10;E) burning natural gas for home heating.

Accepted Answer

The largest personal contribution to global warming in a year comes from driving your car, as it emits greenhouse gases into the atmosphere. Other options listed also contribute to global warming, but driving a car is typically the biggest contributor for individuals.

Question 6

Increases in the temperature of the earth due to the greenhouse effect over the last 50 years is least due to ________.&#10;A) burning of oil by industry and utilities&#10;B) flatulence by cows&#10;C) addition of hot water to lakes by utilities&#10;D) clearing land for farming&#10;E) use of freons

Accepted Answer

The least contribution to the increase in Earth's temperature due to the greenhouse effect over the last 50 years comes from the addition of hot water to lakes by utilities. This is because the primary contributors to the greenhouse effect are greenhouse gases like carbon dioxide and methane, which trap heat in the atmosphere. The addition of hot water to lakes is a localized thermal pollution issue and does not contribute significantly to the global greenhouse effect.

Question 7

CFC's in the stratosphere ________.&#10;A) provide protection from incoming solar radiation&#10;B) dissipate within days&#10;C) combine with NOX to produce smog&#10;D) adsorb ultraviolet light from the sun&#10;E) contribute to ozone destruction

Accepted Answer

CFC's in the stratosphere contribute to ozone destruction.

Question 8

The emissions of particulates due to the burning of coal can be reduced by the use of ________.&#10;A) electrostatic precipitators&#10;B) scrubbers&#10;C) coal from strip mines of the Western US&#10;D) limestone&#10;E) catalytic converters

Accepted Answer

Electrostatic precipitators are devices that remove particulates from exhaust gases by applying an electric charge to the particles, which are then attracted to and collected on charged plates.

Question 9

If the volume of an object were to be halved with the same mass, its density would&#10;A) halve&#10;B) double&#10;C) stay the same

Accepted Answer

Density is defined as mass divided by volume. If the mass remains the same and the volume is halved, then the density must double because there is the same amount of mass in half the amount of volume.

Question 10

Which of the following air pollutants is emitted mainly by the automobile?&#10;A) particulates&#10;B) carbon monoxide&#10;C) sulfur dioxides&#10;D) hydrocarbons&#10;E) nitrogen oxides

Accepted Answer

The answer of Which of the following air pollutants is...

Question 11

One of the changes experienced by a body of water when waste heat is added from a power plant is ________.&#10;A) an increase in water's capacity to hold oxygen&#10;B) an increased spawning success for fish&#10;C) an increased biological growing season&#10;D) decreased eutrophication

Accepted Answer

The answer of One of the changes experienced by a...

Deck 5: Air Pollution, Global Warming, and Fossil Fuels