WorksheetsUnit 5: Air Pollution Review
Total questions: 20
Worksheet time: 10mins
Which gases make up most of clean, dry air?
Carbon dioxide and oxygen
Nitrogen and oxygen
Oxygen and argon
Nitrogen and carbon dioxide
Air pollution occurs when
oxygen levels decrease naturally
harmful substances build up to unhealthy levels
clouds trap moisture
temperature increases rapidly
Which of the following is a natural source of air pollution?
Car exhaust
Power plants
Volcanoes
Gas stations
A pollutant released directly into the air is called a
secondary pollutant
smog particle
primary pollutant
greenhouse gas
Which is an example of a secondary pollutant?
Carbon monoxide
Sulfur dioxide
Ground-level ozone
Particulate matter
Ground-level ozone forms when emissions react with
rainwater
nitrogen gas
ultraviolet sunlight
carbon dioxide
Which two sources are the largest contributors to urban air pollution?
Agriculture and mining
Volcanoes and dust storms
Motor vehicles and industry
Forest fires and oceans
Carbon monoxide is especially dangerous because it
destroys plant cells
causes acid rain
interferes with oxygen transport in blood
forms smog directly
Which pollutant is odorless, colorless, and poisonous?
Nitrogen oxides
Sulfur dioxide
Carbon monoxide
VOCs
Nitrogen oxides (NOx) are mainly produced by
evaporation of household products
burning fuels at high temperatures
plant respiration
volcanic eruptions
Which pollutant contributes to both smog and acid precipitation?
Carbon monoxide
Nitrogen oxides
Particulates
VOCs
Volatile organic compounds (VOCs) are best described as
solid particles in smoke
gases formed from nitrogen and oxygen
organic chemicals that easily vaporize
odorless, nonreactive gases
A major source of VOCs is
cement plants
vehicles and gasoline spills
volcanoes
agriculture
Fine particulate matter mainly comes from
mining operations
forest pollen
fuel burned by vehicles and power plants
ocean spray
Smog is best defined as
acid precipitation in cities
trapped greenhouse gases
air pollution that reduces visibility
smoke from factories only
Which condition is necessary for smog formation?
Heavy rainfall
Strong winds
Sunlight
Cold temperatures only
A temperature inversion occurs when
cool air rises above warm air
warm air traps cooler air near the surface
pollution rises into the upper atmosphere
winds increase air circulation
Why are cities in valleys more prone to temperature inversions?
Valleys receive more sunlight
Mountains block upward air movement
Valleys produce more pollutants
Valleys are warmer year-round
Which law gives the EPA authority to regulate vehicle emissions?
Water Quality Act
Environmental Protection Act
Clean Air Act
Energy Conservation Act
Catalytic converters help reduce air pollution by
trapping dust particles
filtering carbon dioxide
chemically changing exhaust pollutants
cooling exhaust gases
