Removing and replacing keys on Acer Aspire laptop's keyboard may require a small screwdriver for precision. Keyboard keys of Acer laptops designed for easy removal and replacement.
How to Measure Air Pollution for a Science Fair Project. Pollution is one among the major problems of todayâs world and air pollution is one root cause of many environmental issues. You can use a magnifying glass for this purpose as the dust particles are too tiny to be seen with necked eye. 2  Count the number of dust particles carefully stuck to the Vaseline in each square and note them down on a note book. 3  Use the number of dust particles sticked to the squares as a proof of air pollution.
Some types of air pollution are as follows. Smog: The first type of the air pollution is the smog. It is defined as when the smoke present in the atmosphere after emitting from different sources is combined with the fog present in the air, a mixture formed that is referred to as smog.ypes Of Air Pollution. Air pollution is one of the major problems of the present world. There are so many causes that can pollute the air completely and spread different types of dangerous diseases. On the basis of the different causes of air pollution it can be distinguished into different types.