Air quality revision power-point. Quiz style

<p>20 questions in 40 mins made up of starter and extension… (2 questions per topic) Rules of the game: 1. Working in groups of no more than 4. 2. You have 1 minute for each starter question; a correct answer is worth 5 points. 3. You have 2 minutes for each extension question; a correct answer is worth 10 points. 4. The group with the highest score will all get a phone call home… or reward of your choice.</p>