AcDec Science 4

What role do lichens play in indicating air pollution?

• They produce oxygen

• They change color in polluted areas

• They indicate changes in air pollutant levels

• They grow faster in polluted areas

How long did Purvis's team monitor the transplanted lichens?

• One year

• Two and three years

• Five years

• Ten years

Which pollutants were found in significant levels in the lichens?

• Lead, zinc, uranium

• Copper, silver, gold

• Iron, nickel, cobalt

• Mercury, cadmium, arsenic

What type of particulates were found in the lichens?

• Coal dust

• Sand particles

• Plastic fibers

• Pollen grains

What is the significance of the analysis of native lichens?

• Long-term pollutant accumulation

• Short-term weather changes

• Immediate health benefits

• Seasonal color changes

What does the presence of coal dust in lichens indicate?

• Air pollution

• Soil erosion

• Water contamination

• Increased humidity

What is the main pollutant resulting from radiation exposure in lichens?

• Uranium

• Mercury

• Arsenic

• Lead

What is the primary focus of environmental science in relation to air pollution?

• Studying the impact of air pollution on marine life

• Monitoring the role of science in air pollution

• Managing the impact of air pollution on human health and environmental systems

• Developing new sources of air pollution

What is the main source of sulfur dioxide in the atmosphere?

• Photosynthesis

• Volcanic eruptions and burning of fossil fuels

• Ocean evaporation

• Forest fires

What is particulate matter commonly known as?

• Clean air particles

• Dirty burning pollutants

• Water vapor

• Nitrogen oxides