Condensation is the change of water vapours  into liquid water. This process is opposite of vapourisation.

In this method, the water flowing on the houses, roads, ground or lawns etc, is collected in ponds and storage tanks. This water is allowed to penetrate (percolate) into the ground to recharge the ground water. This is also known as water harvesting.

Sun is the main source of the energy as Due to the heat of Sun the surface water of earth evaporate in to the atmosphere, which return back through condensation in the form of rain and snow.

The water drops that form on cool surfaces during the night is called as dew.

The underground water is the main source of inland lakes.

Rain is the source of soft water.

When the condensed small water droplets increase in size then through precipitation atmospheric water returns back to the earth in the form of rain.

Sedimentation is the process settling down of impurities. This is done with the help of alum.

Calcium and magnesium bicarbonates are present in temporary hard water.

Yes, it the density of pure water.

Yes, water is evaporated from our body by respiration and excretion, so we need a regular intake of water.

 Circulation of water from the earth's surface to the atmosphere and back to the Earth is called the water cycle.

The pH of pure water is 7, it is termed as neutral .

Potable water is the water which is used for drinking purposes. So a glass of drinking water is potable water.

The human body contains 70% of water.