Answer:
1. Air pollution is caused by solid and liquid particles and certain gases that are suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires. The solid and liquid particles suspended in our air are called aerosols.
2. Effective questioning involves using questions in the classroom to open conversations, inspire deeper intellectual thought, and promote student-to-student interaction. Effective questions focus on eliciting the process, i.e. the 'how' and 'why,' in a student's response, as opposed to answers which just detail 'what.
