Question

1. choose the correct answer.

____ remove pollutants from smokestacks and car exhaust.

solar panels
air quality sensors
smart thermostats
air filters

1. choose the correct answer.

air quality sensors measure ____ in the air to determine how clean it is.

noise
humidity
temperature
pollutants

Explanation:

Question 9

Solar panels generate electricity from sunlight, not remove pollutants. Air quality sensors only detect pollutants, not remove them. Smart thermostats control temperature, not remove pollutants. Air filters are designed to remove pollutants from air sources like smokestacks and car exhaust.

Noise is measured by sound sensors, humidity by hygrometers, temperature by thermometers. Air quality sensors specifically measure pollutants (like particulate matter, gases) to assess air cleanliness.

Answer:

D. Air filters

Question 10