Tamilnadu Samacheer Kalvi 3rd Science Solutions Term 1 Chapter 2 State of Matter Text Book Back Questions and Answers

 

Tamilnadu Samacheer Kalvi 3rd  Science Solutions Term 1 Chapter 2 State of Matter

Samacheer Kalvi 3rd Science Guide State of Matter  Text Book Back Questions and Answers

List out some of the matters around you.

1. Car

 2. Water

 3.  Tree

4. Chair

I.  Indicate whether the following statements

are true or false.

1. Solids have a definite volume. True

2. Liquids can not flow. False

3. We can melt any substance by cooling it. False

4. Liquids can take the shape of the container. True

5. Gases have a definite shape or volume. False

6. Matter changes its state when heat is added or removed. True

7. A fuel is a substance which gives heat energy on burning. True

II. Fill in the blanks. (Evaporation, Mass, Water, Solid, Stone, Freezing)

1.  The measure of matter in an object is called ___________. Mass

2. Change of liquid into vapour on heating is called ___________. Evaporation

3.  An example for liquid is _________. Water

4.   The change of liquid into solid on cooling is known as ______________. Freezing

5. An example for solid is ___________. Stone

III.  Draw a line to match the objects and their state of matter.

IV. Answer in a word or two.

1.Which of these is a solid: wood or juice? ___________.

Wood

2. Which of these is hard : a sponge or a glass or a cloth? ___________.

a glass

3. What are three states of matter? ____, ______, ___________.

Solid , Liquid and Gas

4. Name three substances which can change to liquid when they are heated?

Ice,

Metals

5. In which state of matter the particles are very close to each other?

Solid state

6. What state of matter is rain?

Changes of gas into liquid on cooling is called condensation. For example; clouds (gas) on cooling condense and fall as rain (liquid)

7. Which among the state of matter has definite volume but no definite shape?

Liquid

8. What would cause a liquid to turn into a solid?

     a) Pouring it into a container      b) Heating it until it boils

c) Cooling it until it freezes       d) Keeping its temperature the same

9. What are some properties of pencil?

It is an example for solid

V. Find me. ( Liquid, Water, Wood)

1.   I am a five letter word. I am an essential need for your life. I remain in all the three states of matter. Who am I ? Water

2.  I am a solid. I am obtained from the trees. I am useful for heating. Who am I? Wood

3.  I am one among the three states. I have loosely arranged particles. I become vapour on heating. Who am I ? Liquid

VI. Describe the word in one sentence.

1.  Solid : definite shape and volume _______

2. Liquid: do not have a definite shape but have a definite volume ________

3. Melting: Change of solid into liquid on heating

4. Evaporation: Change of liquid into vapour on heating _________________________

5. Freezing: Change of liquid into solid on Cooling ______________________________

VII.  Which change of state is taking place in each description below?

Use these words.

Condensation Evaporation Freezing Melting

a) An ice cube turning to water Melting

b) Water turning to ice in a freezer Freezing

c) Change of liquid into vapour on heating __________ Evaporation __________

d) A bathroom mirror misting up  __ Condensation ____

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