Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 6th

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide chapter 1 - Heat [Latest edition]

Chapter 1: Heat

Evaluation
Evaluation [Page 14]

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide Chapter 1 HeatEvaluation [Page 14]

Evaluation | Q I. 1. | Page 14

When an object is heated, the molecules that make up the object

• begin to move faster

• lose energy

• become heavier

• become lighter

Evaluation | Q I. 2. | Page 14

The unit of heat is

• newton

• joule

• volt

• celsius

Evaluation | Q I. 3. | Page 14

One litre of water at 30o C is mixed with one litre of water at 50o C. The temperature of the mixture will be

• 80o C

• More than 50°C but less than 80o C

• 20o C

• around 40o C

Evaluation | Q I. 4. | Page 14

An iron ball at 50°C is dropped in a mug containing water at 50o C. The heat will

• flow from iron ball to water.

• not fl ow from iron ball to water or from water to iron ball.

• flow from water to iron ball.

• increase the temperature of both.

Evaluation [Pages 14 - 15]

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide Chapter 1 HeatEvaluation [Pages 14 - 15]

Fill in the blanks

Evaluation | Q II. 1. | Page 14

Heat flows from a ______ body to a _____ body.

Evaluation | Q II. 2. | Page 14

The hotness of the object is determined by its ______.

Evaluation | Q II. 4. | Page 14

Solids ______ on heating and ______ on cooling.

Evaluation | Q II. 5. | Page 15

Two bodies are said to be in the state of thermal ____ if there is no transfer of heat taking place.

Evaluation [Page 15]

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide Chapter 1 HeatEvaluation [Page 15]

True or False. If False, give the correct statement

Evaluation | Q III. 1. | Page 15

Heat is a kind of energy that flows from a hot body to a cold body.

• True

• False

Evaluation | Q III. 2. | Page 15

Steam is formed when heat is released from water.

• True

• False

Evaluation | Q III. 3. | Page 15

Thermal expansion is always a nuisance.

• True

• False

Evaluation | Q III. 4. | Page 15

Borosilicate glass do not expand much on being heated.

• True

• False

Evaluation | Q III. 5. | Page 15

The unit of heat and temperature are the same.

• True

• False

Evaluation [Page 15]

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide Chapter 1 HeatEvaluation [Page 15]

Evaluation | Q IV. 1. | Page 15

Give reason for the following

An ordinary glass bottle cracks when boiling water is poured into it, but a borosilicate glass bottle does not.

Evaluation | Q IV. 2. | Page 15

Give reason for the following

The electric wire which sag in summer become straight in winter.

Evaluation | Q IV. 3. | Page 15

Rivet is heated before fixing in hole to join two metal plates.

Evaluation [Page 15]

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide Chapter 1 HeatEvaluation [Page 15]

Evaluation | Q V. | Page 15

Match the following

 1 Heat 0o C 2 Temperature 100o C 3 Thermal Equilibrium kelvin 4 Ice cube No heat flow 5 Boiling water joule
Evaluation [Page 15]

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide Chapter 1 HeatEvaluation [Page 15]

Evaluation | Q VI. 1. | Page 15

Analogy

Heat : Joule :: Temperature : _____

Evaluation | Q VI. 2. | Page 15

Analogy

Ice cube : 0o C :: Boiling water :______

Evaluation | Q VI. 3. | Page 15

Analogy

Total Kinetic Energy of molecules: Heat :: Average Kinetic Energy : ______.

Evaluation [Page 15]

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide Chapter 1 HeatEvaluation [Page 15]

Evaluation | Q VII. 1. | Page 15

Make a list of electrical equipments at home which we get heat from.

Evaluation | Q VII. 2. | Page 15

What is temperature?

Evaluation | Q VII. 3. | Page 15

What is thermal expansion?

Evaluation | Q VII. 4. | Page 15

What do you understand by thermal equilibrium?

Evaluation [Page 15]

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide Chapter 1 HeatEvaluation [Page 15]

Evaluation | Q VIII. 1. | Page 15

What difference do you think heating the solid will make in their molecules?

Evaluation | Q VIII. 2. | Page 15

Distinguish between heat and temperature.

Evaluation [Page 15]

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide Chapter 1 HeatEvaluation [Page 15]

Evaluation | Q IX. | Page 15

Explain thermal expansion with suitable examples.

Evaluation [Page 15]

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide Chapter 1 HeatEvaluation [Page 15]

Questions based on Higher Order Thinking Skills

Evaluation | Q X. 1. | Page 15

When a window is accidentally left open on a winter night, will you feel uncomfortable because the cold is getting in, or because the heat is escaping from the room?

Evaluation | Q X. 2. | Page 15

Suppose your normal body temperature were lower than what it is. How would the sensation of hot and cold change?

Evaluation | Q X. 3. | Page 15

If you heat a circular disk with a hole, what change do you expect in the diameter of the hole? Remember that the effect of heating increases the separation between any pair of particles.

Evaluation

Tamil Nadu Board Samacheer Kalvi solutions for Class 6th Science Term 2 Answers Guide chapter 1 - Heat

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Concepts covered in Class 6th Science Term 2 Answers Guide chapter 1 Heat are Heat and Its Unit, Sources of Heat, Hot and Cold Objects, Temperatures, Flow of Heat, Numerical Problems of Heat, Expansion of Substances (Thermal Expansion), Expansion of Solids, Heat and Temperature.

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