Home » Science Projects » Science Project on “Changing Environments”, Project Experiment Topics on Environmental Science for Class 8, 9, 10 and 12 Students.

Science Project on “Changing Environments”, Project Experiment Topics on Environmental Science for Class 8, 9, 10 and 12 Students.

Changing Environments

Materials Required:

  1. An adult with a drill
  2. Plastic soda bottles with screw caps
  3. A large pail
  4. Small stones
  5. Three feet of plastic
  6. Aquarium tubing rubber band

While some air carriers are known as heavier-than-air (like airplanes and helicopters), there are also some carriers, which are lighter-than-air (like balloons and gliders).

These gas balloons are still less than the weight of the air that would take up the same amount of space.

The bottom of the ocean air is where we live. The behaviour of air and water is more or less the same.

This concept of lighter-than-air can be explained very easily with the help of a bottle and a bathtub full of water.

With the help of an adult, drill three small holes of about 7 mm in diameter, in an empty plastic soda bottle.

Remember that these drilled holes need to be around 5 cm, above the bottom of the bottle. Now fill your pail with water. Put the soda bottle in the water, so that the water level is just above the three holes. This will allow the water to go into the bottle and will make the bottle float.

Also drop some pebbles into the bottle, so that it sinks. Then screw the cap on the bottle.

Now through one of the holes of the bottle, put in that plastic tubing. Put it in such a way, that the pipe moves towards the top of the bottle.

With the help of a rubber band, secure the tube to the bottle. Once this is done, you should blow into the tube.

When this happens, air pushes the water out of the holes and replaces it. Since the air inside the bottle weighs less than the atmosphere outside the bottle, this makes the bottle rise.

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