CBSE Class 3 EVS Water Worksheet Set 04

CBSE Class 3 EVS Practice Worksheets (99)-Water

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I. Fill in the blanks:

Question 1. Ice melts to form .........................................
Answer: water
In simple words: Ice turns into water when it gets warm.

Exam Tip: Remember that melting means a solid turns into a liquid.

Question 2. The gaseous form of water is .........................................
Answer: water vapour
In simple words: Water vapour is the gas form of water.

Exam Tip: Be sure to write 'water vapour' with the correct spelling.

Question 3. .........................................and ......................................... state have no shape of their own.
Answer: Liquid, gas
In simple words: Liquids and gases take the shape of their container.

Exam Tip: Only solids keep their own fixed shape.

Question 4. Little balls of ice are called .........................................
Answer: hail
In simple words: Hail is frozen rain that falls from clouds.

Exam Tip: This is also sometimes called hailstones.

II. Tick the correct answer:

Question 1. The colour of the water is
(a) white
(b) colourless
(c) blue
Answer: (b) colourless
In simple words: Clean water has no colour at all.

Exam Tip: Do not choose blue. Water only looks blue because it reflects the sky.

Question 2. When you boil water it changes into
(a) liquid
(b) water vapour
(c) ice
Answer: (b) water vapour
In simple words: Boiling water makes it turn into a gas called steam or water vapour.

Exam Tip: Boiling is the process where a liquid changes into a gas.

Question 3. An example for gas is
(a) oxygen
(b) snow
(c) hail
Answer: (a) oxygen
In simple words: Oxygen is a gas that we breathe.

Exam Tip: Snow and hail are solids because they are made of ice.

III. Write True or False:

Question 1. When drops of water in clouds become light it rains.
Answer: False
In simple words: It only rains when the water drops in clouds get very heavy.

Exam Tip: Heavy water drops fall down to earth because of gravity.

Question 2. Heat makes ice melt.
Answer: True
In simple words: Warming up ice makes it turn back into liquid water.

Exam Tip: Heat is the energy that causes solid ice to change states.

Question 3. Water keeps changing from solid to liquid to gas in nature.
Answer: True
In simple words: Water goes through these stages in nature. This is called the water cycle.

Exam Tip: This continuous movement of water is essential for life on Earth.

Question 4. When water vapour cools it changes into ice.
Answer: False
In simple words: When water vapour cools down, it turns back into liquid water first.

Exam Tip: Cooling of water vapour to liquid water is called condensation.

IV. Look at the picture and complete the sentences given below:

Question 1. Water changes into ......................................... on heating.
Answer: water vapour
In simple words: Heating water makes it change into gas.

Exam Tip: This change from liquid to gas is called evaporation.

Question 2. Water changes into ice on .........................................
Answer: cooling
In simple words: Cooling water down in a freezer makes it freeze into ice.

Exam Tip: Cooling is the process of removing heat from a substance.

Question 3. Ice changes into water on .........................................
Answer: heating
In simple words: Warming up ice makes it turn into water.

Exam Tip: This phase change is known as melting.

Question 4. Water vapour changes into ......................................... on cooling.
Answer: water
In simple words: Cooling down steam makes it turn back into liquid water.

Exam Tip: You can see this when water drops form on a cold lid.

Question 5. The solid form of water is .........................................
Answer: ice
In simple words: Ice is water in its solid state.

Exam Tip: Ice, snow, and frost are all solid forms of water.

Question 6. The form of water which has its own shape is .........................................
Answer: ice
In simple words: Ice is solid, so it keeps its own shape.

Exam Tip: Liquids and gases do not have their own fixed shapes.

V. Give reasons:

Question 1. Clouds and balloons float in air because
Answer: they are lighter than the air around them.
In simple words: Things that are very light will float in the air.

Exam Tip: Lighter gases like helium or warm air rise above cooler, heavier air.

Question 2. Ice melt when you bring it out of the freezer because
Answer: the room is warmer than the freezer. Heat melts the ice.
In simple words: Ice needs to stay very cold. Warm air melts it into water.

Exam Tip: The temperature of the room is above freezing point (0 degrees Celsius), which provides the heat needed for melting.