Quiz and Cloze Notes

The Student Guide and Introduction to Indoor Air Pollution – Starter Pack contains the quiz and cloze notes.
Quiz Answer Key: Q1:B Q2:C Q3:A Q4:D
Cloze Notes Answer Key: billion, biomass, pollution, health, [LPG, biogas], electric

Data Set

The Student Guide contains the Introduction to Indoor Air Pollution – Data Set.
Answer Key: Question 1: A very dark shade on the first map means the country has a high percentage of people with access to clean cooking fuels. The darkest color on the map represents numbers close to 100% access.
Question 2: On the second map, a very dark shade means the death rate from indoor air pollution is very high. The darker shades on the legend show higher numbers of deaths per 100,000 people, so dark areas represent more deaths.
Question 3: The two maps seem connected because countries with low access to clean cooking fuels (lighter colors in the first map) often have higher death rates from indoor air pollution (darker colors in the second map). This suggests that when people don’t have clean fuels, they may use fuels that harm their health and increase deaths.
Question 4: In places without clean fuel access, people may use wood, charcoal, crop waste, or animal dung for cooking. These fuels create a lot of smoke when burned. Breathing the smoke can damage people’s lungs and cause sickness or even death. It also harms the environment because burning these fuels can create air pollution and contribute to deforestation when trees are cut down for firewood.

Air Filters In Action Lab

The Student Guide contains the Air Filters in Action – Student questions.
Part 3: Analysis – Understanding Your Lab Results

  1. Answers will vary.
  2. (Sample Student Response: The No Filter card had a lot more dust. Probably around 70-80% of the sticky tape had captured a layer of specks. The Filter card had a lot less dust. Maybe only 5-10% of the surface had some specks. The No Filter card looked messy and dirty because of the captured dust, while the Filter card looked almost clean.)
  3. Answers will vary. 
  4. (Sample Student Response: The filter allowed air through because the material had tiny pores that air can fit through, but larger dust particles cannot. Also, the material is made of fibers that crisscross, forming a sort of web. As the air moves through, the fibers catch and hold onto the dust. Its thickness and layers also help give the particles more chances to get stuck and not pass through.)
  5. (Sample Student Response: (1) Uneven blowing strength: If I blew harder during one trial than the other, more or fewer particles could have moved through the box, changing the dust amounts hitting the filter outlet. (2) Leaky filter setup: If the tape around the filter wasn’t sealed perfectly, dust might escape around the edges instead of going through the filter material. Both of these could make the results look more or less effective than they really were.)
  6. (Sample Student Response: One improvement would be to use a more precise measuring spoon to make sure the cocoa amount is exactly the same each time. Another improvement would be to seal the box shut, so that the air doesn’t find alternative exits, and must go through the filter. Both changes would reduce variation and make the experiments more reliable.)

Part 4: Application – Connection to Indoor Air Quality

  1. (Sample Student Response: Air filtration is important because it helps keep people healthy by blocking harmful particles from being inhaled. Filters can remove things like dust, dirt, pollen, allergens, smoke, or other tiny particles from the air.)
  2. (Sample Student Response: Both let air pass through tiny pores but trap bigger particles, cleaning the air and keeping those particles from getting into your lungs. Real air filters are usually made from stronger materials and have multiple layers, while our filter was just one simple sheet. Real filters also trap much smaller particles than our filter can.)
  3. (Sample Student Response: If a filter creates too much resistance, air cannot move through easily. This can make rooms stuffy, reduce ventilation, and make fans or HVAC systems work harder. If a filter provides too little filtration, harmful particles will still pass through. For example, smoke or allergens that stay in the air can cause breathing problems, even though the air seems to flow well.)
  4. Answers will vary. 
  5. (Sample Student Response: Add or upgrade air vents or fans to increase fresh air movement and help remove indoor pollutants. Install better air filters or use portable air purifiers to remove dust, pollen, smoke and other particles from the air.)