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.
There are many ways to make a model of land pollution for a school  science exhibition. One idea is to show a diorama of land and lake  area clean next to a diorama of the s â¦ ame scene with sludge in the  water.his makes your model sucessful. if you want, show some animals and humans dieing near the vessel containing the water. also add the dust and pieces of paper to show litter around and in the water.