Shlomi and Adva live in Tivon, a
hilly town in Northern Israel. Adva has asthma. The town is designed to encourage healthy exercise and there are bike paths to their school, but when air pollution levels are high, people are recommended to avoid exercising outdoors.
mother checks the air quality using the the air quality index (AQI) before deciding if they should
bike to school. During the recent sandstorm, the children were not allowed to bike to school because of government health warnings and recommendations.
Sand storms are a global phenomena and sand can be carried long distances by the wind before being deposited. Look at the animation below to see how sand and other soil particles can travel.
The AQI is calculated by testing for levels (concentrations) of priority pollutants including particulates like sand, but also ground-level ozone, carbon monoxide and sulfur dioxide; using standard formulas. These pollutants are known to harm health. The AQI is the highest value measured at a point (where the monitoring station is located) over a period of time.
AQI values below 100 are generally thought of as
satisfactory. When AQI values are above 100, air quality is considered to be
unhealthy-at first for certain sensitive groups of people, such as asthmatics, then
for everyone as AQI values get higher.
Air Pollution Level
Air quality is considered satisfactory, little or no risk
Air quality is satisfactory for most people, with a moderate
health risk for a small group of very sensitive people.
Unhealthy for Sensitive Groups - old, sick, asthmatics
Sensitive groups may experience health effects, general public not
likely to be affected.
begin to experience health effects; members of sensitive groups more serious
warnings of emergency conditions. Entire population more likely to be
Health alert: everyone may experience more serious health effects.
Should Shlomi and Adva have biked to school that monday?
The question is very challenging, as it represents plenty of information.
I'm not sure whether is is not to complicated and "loaded" for junior high schoo; children.
I have found it difficult to choose the correct answer, as - according to the table added to the question - higher levels than 51 are not recommended for asthmatic people, while the level within the question is 54.
Please ignore the previous comment. Debby, you may delete it.
The question is very detailed, and represents the subject in various
It is also very challenging, as it includes plenty of information.
However, I'm not sure, whether it is not too complicated and "loaded"
for junior high school children.
I have found it difficult to choose the correct answer, as - according
to the AQI's table you added - AQI's levels higher than 51 are not recommended
for asthmatic people, while the AQI level in the question is 54, and the
correct answer mentions levels lower than 100 as satisfactory, although Adva
suffers from asthma.
As for the map, I added Delhi,
India, as the
most air-polluted city in the world, according to the World Health Organization
report for 2015.