What happens when water is boiled?
  • It freezes
  • It condenses
  • It turns into vapour
  • It turns into ice
When puddles of water disappear after a sunny day, the process responsible for this change is called:
  • Condensation
  • Evaporation
  • Freezing
  • Melting
Water droplets form on the outer surface of a cold glass kept in open air because:
  • Water leaks through the glass
  • Ice melts on the surface
  • Water vapour in air cools and changes into liquid
  • Air pressure increases near the glass
Which statement correctly compares ice and water?
  • Both ice and water have fixed shapes
  • Both ice and water take the shape of the container
  • Ice has a fixed shape, while water does not
  • Ice and water both flow easily
Which of the following best defines the process of melting?
  • Conversion of liquid into gas on heating
  • Conversion of gas into liquid on cooling
  • Conversion of a solid into liquid on heating
  • Conversion of liquid into solid on cooling
Which of the following best defines the process of freezing?
  • Conversion of solid into liquid on heating
  • Conversion of liquid into gas on heating
  • Conversion of gas into liquid on cooling
  • Conversion of liquid into solid on cooling
Which of the following best defines evaporation?
  • Conversion of liquid into gas on heating till boiling
  • Conversion of gas into liquid on cooling
  • Conversion of a liquid into gas at the surface without boiling
  • Conversion of solid into liquid on heating
Which statement best explains why higher temperature causes faster evaporation?
  • Heat gives energy to liquid particles, allowing them to escape into the air
  • Heat increases the amount of water in air
  • Heat changes water directly into steam
  • Heat reduces the surface area of water
What is meant by the cooling effect of evaporation?
  • Increase in temperature when water changes into vapour
  • Drop in temperature when a liquid changes into gas by taking heat from surroundings
  • Cooling caused by wind movement
  • Change of gas into liquid due to cooling
What is the water cycle?
  • Movement of water only in oceans
  • Continuous movement of water on, above, and below the surface of the Earth
  • Formation of clouds only during rain
  • Change of water only from liquid to gas
During evaporation, what happens to water vapour formed from water bodies?
  • It settles at the bottom of rivers
  • It turns directly into ice
  • It remains mixed with water
  • It rises up into the air
What happens to water vapour as it rises higher in the atmosphere?
  • It becomes hotter and spreads out
  • It turns directly into ice
  • It cools down and forms tiny water droplets
  • It disappears completely
What is precipitation with respect to the water cycle?
  • Process by which water falls from clouds to the Earth as rain, snow, hail, or sleet
  • Rise of water vapour into the atmosphere
  • Change of water vapour into clouds
  • Conversion of ice into water
What are the three states of water?
  • Solid, Liquid, Gas
  • Ice, Vapour, Snow
  • Steam, Cloud, Rain
  • Cold, Hot, Warm
What is the process of changing ice into water called?
  • Freezing
  • Evaporation
  • Melting
  • Condensation
What happens to the water level when ice melts?
  • It increases
  • It decreases
  • It remains the same
  • It disappears
What is condensation?
  • Changing gas to liquid
  • Changing liquid to gas
  • Changing solid to liquid
  • Changing solid to gas
Which process converts water into water vapour?
  • Evaporation
  • Condensation
  • Melting
  • Freezing
What are the tiny droplets that form on the outer surface of a cold glass called?
  • Evaporation
  • Condensation
  • Freezing
  • Boiling
What is the main source of water on Earth?
  • Rivers
  • Lakes
  • Oceans
  • Ponds
How do clouds form?
  • By freezing of air
  • By condensation of water vapour
  • By evaporation of dust
  • By melting of ice
Which process helps in drying clothes?
  • Condensation
  • Freezing
  • Evaporation
  • Boiling
Which state of matter is water vapour?
  • Solid
  • Liquid
  • Gas
  • Plasma
What happens when water vapour cools down?
  • It turns into gas
  • It turns into ice
  • It turns into liquid
  • It disappears
Why do water droplets form on grass in the morning?
  • Due to condensation
  • Due to melting
  • Due to evaporation
  • Due to freezing
How can we convert water into ice?
  • By freezing
  • By heating
  • By evaporating
  • By condensing
What is the process of turning water vapour into liquid called?
  • Condensation
  • Melting
  • Freezing
  • Evaporation
What role does the sun play in the water cycle?
  • It cools the water
  • It evaporates water
  • It condenses water
  • It freezes water
Why do wet clothes dry faster in sunlight than in shade?
  • Because of condensation
  • Because of freezing
  • Because heat increases evaporation
  • Because wind decreases evaporation
What is the continuous movement of water between land, air, and oceans called?
  • Water cycle
  • Condensation
  • Evaporation
  • Precipitation
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