Lowest layer of Earth's atmosphere

Water can be stored in?

Earth contain different amount of water each year

What is water cycle?

Water cycle is known as?

What does hydrological cycle describe?

What does precipitation mean?

List any 5 types of precipitation.

Shortly tell that how a snowflake forms

Water freezes when temperature is

Water can be in different states

What is evaporation?

Water melts when temperature is

What is condensation?

Water cycle is driven by?

Name the major exchange processes of water cycle?

What is freezing?

As air rises temperature also rises

What does melt mean?

What is sublimation?

What is transpiration is?

What is water table?

Shortly tell how hailstorm is formed?

Shortly tell how sleet is formed?

Why sometime raindrops freezes?

Differentiate between fog and mist

Give example of fog in our daily life?

Wwhere your water supply comes from?

Why there is not enough water for all our needs?

What are pipelines?

What are canals ?

What is meant by range?

What are reservoir?

Why wells have to be dug deeper?

Why emkankments are built?

What are embankment?

How can Pakistan solve it's water problem?

What is a barrage?

How can we store and control flow of water?

How can we stop water from being polluted?

How water is supplied to towns and cities?

How water is supplied to villages?

How can we improve the quality of water?

What is sewage water treatment?

What problems are caused by open drains?

What is biogas?

List some benefits of biogas?

What was the problem in majeed keerio?

How was the problem solved on majeed keerio?

What is wetland treatment?

Most households in cities have underground drains for sewage water

Most drains in rural areas are open

In Pakistan sweage water is not treated