What is water?
Water is a transparent, tasteless, odorless, and nearly colorless liquid that is essential for life.

What is the chemical formula of water?
The chemical formula of water is H₂O.

Why is water important for living things?
Water is needed for drinking, digestion, cooking, cleaning, and various bodily functions.

What are the three states of water?
Solid (ice), liquid (water), and gas (water vapor).

What is the boiling point of water?
The boiling point of water is 100°C 

What are natural sources of water?
Rivers, lakes, ponds, seas, oceans, rain, and groundwater.

What are man-made sources of water?
Dams, wells, canals, and reservoirs.

What is groundwater?
Water stored underground in soil and rocks.

What is rainwater harvesting?
Collecting and storing rainwater for future use.

Why are rivers important?
They provide drinking water, irrigation, and support aquatic life.

What is the water cycle?
The continuous process by which water moves from the Earth’s surface to the atmosphere and back.

What are the stages of the water cycle?
Evaporation, condensation, precipitation, and collection.

What is evaporation?
The process by which water changes from liquid to vapor.

What is condensation?
The process of water vapor cooling and changing into liquid.

What is precipitation?
Water falling from clouds as rain, snow, sleet, or hail.

Why is water conservation important?
To ensure the availability of water for future generations.

How can we save water at home?
Fixing leaks, using buckets instead of hoses, and turning off taps when not in use.

What is drip irrigation?
A method to conserve water by delivering it directly to plant roots.

Why should we not waste water?
Because water is a limited and precious resource.

What is pollution of water?
Contamination of water bodies with harmful substances.

List some uses of water.
Drinking, cooking, bathing, cleaning, agriculture, and industries.

Why is water important for plants?
It helps in photosynthesis and nutrient transport.

How do animals use water?
For drinking, bathing, and regulating body temperature.

Why do farmers need water?
To irrigate crops and provide water to livestock.

Why is clean drinking water necessary?
To avoid diseases and stay healthy.

What happens to water when it freezes?
It turns into ice, which is solid.

What happens when water boils?
It changes into steam or water vapor.

Why does ice float on water?
Ice is less dense than liquid water.

What is soluble in water?
Salt and sugar dissolve in water.

Name a substance that does not dissolve in water.
Oil does not dissolve in water.

How does water help cool our body?
By sweating, which evaporates and cools the skin.

What causes clouds to form?
Water vapor cools and condenses to form tiny droplets.

Why do rivers flow?
Due to gravity, from higher to lower ground.

What is fog?
A thick cloud of tiny water droplets near the ground.

How are snowflakes formed?
When water vapor freezes in the atmosphere.

What causes water pollution?
Waste from factories, sewage, plastic waste, and chemicals.

What are the effects of polluted water?
It harms aquatic life and can cause diseases in humans.

Name a way to reduce water pollution.
Proper waste disposal and using biodegradable products.

What is potable water?
Safe and clean drinking water.

How can polluted water be cleaned?
Through filtration, boiling, and purification methods.

Can water exist in all three states naturally?
Yes, as ice, liquid water, and vapor.

What is a glacier?
A large mass of ice that moves slowly over land.

What are aquifers?
Underground layers of rock that store groundwater.

What makes seawater salty?
Dissolved minerals, mainly sodium chloride (salt).

What is desalination?
The process of removing salt from seawater to make it drinkable.

Why does water flow downhill?
Due to the force of gravity.

Why does water sometimes taste different?
Due to dissolved minerals and impurities.

Why should we boil water before drinking?
To kill germs and bacteria.

Why is water called a universal solvent?
Because it can dissolve many substances.

Why do fish survive in water during winter?
Water below the ice remains liquid, providing a habitat.