What did Raja use to cover the container of water in his experiment?

• A metal lid

• A wooden board

• A plastic sheet

• A glass cover

In the water cycle, what state of matter are the water bodies initially in?

• Gas

• Liquid

• Solid

• Plasma

What process allows water vapor to turn into tiny water droplets?

• Sublimation

• Condensation

• Freezing

• Evaporation

What do the tiny water droplets in the clouds represent in Raja's model?

• Lakes

• Seas

• Rivers

• Clouds

In Raja's model, what does the salt water in the container represent?

• Rain

• Clouds

• Seas and lakes

• Rivers

What is the source of heat in Raja's water cycle model?

• A lamp

• A heater

• A candle

• The sun

Why does only the water in the salt water evaporate and not the salt?

• Salt is insoluble

• Salt is heavier

• Salt is a solid

• Salt has a higher boiling point

What is collected in the glass beaker in Raja's model?

• Salt water

• Pure water

• Ice

• Clouds

What happens to the salt in the salt water during the evaporation process?

• It dissolves further

• It turns into gas

• It remains in the container

• It evaporates with the water

What does the water cycle ensure for living organisms on Earth?

• A continuous supply of sunlight

• A continuous supply of salt

• A continuous supply of air

• A continuous supply of water