Air Quality and Pollution Indicators

The video tutorial reviews indicators of pollution, focusing on acid rain, global warming, and the use of indicator species to assess pollution levels. Acid rain results from fossil fuel combustion, affecting trees, limestone, and aquatic life. Global warming is driven by greenhouse gases, raising Earth's temperature. Indicator species, like rat tail maggots and lyans, help determine water and air pollution levels, respectively.

What gases are released during the combustion of fossil fuels that contribute to acid rain?

• Methane and ammonia

• Helium and argon

• Sulfur dioxide and nitrogen oxides

• Oxygen and nitrogen

What is one of the visible effects of acid rain on the environment?

• Increased plant growth

• Formation of new lakes

• Improved air quality

• Erosion of limestone

How do greenhouse gases contribute to global warming?

• By reducing carbon dioxide levels

• By reflecting sunlight away from Earth

• By trapping heat in the Earth's atmosphere

• By increasing oxygen levels

What happens to species diversity in more polluted areas?

• It decreases

• It increases

• It remains the same

• It fluctuates randomly

What is the role of indicator species in assessing pollution levels?

• They increase biodiversity

• They indicate the level of pollution

• They provide food for other species

• They clean the environment

Which water indicator species can survive in low oxygen waters?

• Mayfly larvae

• Frogs

• Rat tail maggots

• Trout

What does the presence of mayfly larvae in water indicate?

• Moderate pollution levels

• High pollution levels

• Presence of sludge worms

• Clean water

What makes lichens good indicators of air quality?

• They grow quickly

• They are resistant to all pollutants

• They change color frequently

• They live in the environment for a long time

Which type of lichen grows in areas with high nitrogen content?

• Red lichen

• Yellow lichen

• Blue lichen

• Green lichen

What is a limitation of using lichens as air quality indicators?

• They require special equipment to observe

• They grow too slowly

• They are not always present where needed

• They are too colorful