Each source: 0.5 Marks
Some of the common sources of water are ponds, rivers, wells and hand pumps.

Each source: 1 Mark
a)The source of water for wells is groundwater.
b)The source of water for groundwater is rain.
c)The source of water in the atmosphere is evaporation from water sources on the ground.

Each step: 1 Mark
The technique involved rooftop rainwater harvesting is as follows:
1. Rainwater is collected at the rooftop.
2. It is allowed to flow into pipes.
3. It is filtered through a wire mesh.
4. It is allowed to pour into an underground tank setup to store rainwater. These tanks contain layers of sand, gravel, charcoal that will filter the dirt and other impurities from rainwater.
5. This water seeps back into ground slowly to increase the level of ground water table.

1 Mark each
The factors responsible for the depletion of the water table are as follows:
(i) Increased population: As our population increases, correspondingly the demand for water also increased. 
(ii) Increasing industries: The number of industries is on the rise ever since the human population began multiplying exponentially. These industries need water for various processes.
(iii) Lack of water conservation techniques: Rain is the main source of water for both surface and underground water bodies. Upon proper conservation, the groundwater can be increased. This has not yet been achieved due to lack of implementation of such water conservative techniques. 
(iv) Agricultural activities: Our country depends vastly on its agricultural roots and the land that is used for cultivation has increased. Hence, water consumption has also increased. Groundwater is exploited as there is an irregularity in the rainfall.This results in the depletion of groundwater.
(v) Urbanisation: Large scale construction requires a lot of water and puts great stress on the water table.

1 Mark each
(a) Clouds get water from land and water is present in them in the liquid form.
(b) Plants get water from the soil and water is present in them in the liquid form.
(c) Mountain tops get water from the atmosphere and water is present in them in the solid form i.e., ice.
(d) Aquifers get water from rain and water is present in them in the liquid form.
(e) Animals get water from water bodies and water is present in them in the liquid form.