9th Class English Medium Physics Chapter 9 Transfer of Heat Short Questions With Answers

9th Class Physics Chapter 9 Online Preparation

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Online Short Questions For Chapter 9 "9th Class Physics English Medium Chapter 9 Preparation "

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Physics (New Book) - 9th Class Physics English Medium Chapter 9 Preparation

Question # 1

What is greenhouse effect

Ans 1: When heat energy reflects from the earth surface, rays with shorter wavelength reflect back toward Sun but before all this radiation cn escape to outer space, greenhouse gases in the atmosphere absorb some of it which makes the atmosphere warmer and Earth surface also warmer This is called greenhouse effect

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Prepare Complete Set Wise Questions For Chapter 9 "9th Class Physics English Medium Chapter 9 Preparation "

Set 1

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Set 2

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Set 3

10 Questions
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Set 4

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Set 5

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Set 6

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Set 7

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Set 8

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Set 9

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9th Class Physics English Medium Chapter 9 Preparation - Set 1

Question # 1

What is greenhouse effect

Ans 1: When heat energy reflects from the earth surface, rays with shorter wavelength reflect back toward Sun but before all this radiation cn escape to outer space, greenhouse gases in the atmosphere absorb some of it which makes the atmosphere warmer and Earth surface also warmer This is called greenhouse effect

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9th Class Physics English Medium Chapter 9 Preparation - Set 2

Question # 1

What is global warming?

Ans 1: During the recent years, the percentage of carbon dioxide has been increased considerably.This has caused an increase in the average temperature of the Earth by trapping more heat due to greenhouse effect.This phenomenon is known as global warming.

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9th Class Physics English Medium Chapter 9 Preparation - Set 3

Question # 1

Why Styrofoam boxes are used to keep food hot or ice cream for a long time.

Ans 1: Styrofoam is a bad conductor of heat. It does ot allow heat to leave or enter the box easily.

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9th Class Physics English Medium Chapter 9 Preparation - Set 4

Question # 1

Why transfer of heat in fluids takes place by convection

Ans 1: In fluids molecules ar not tightly packed. They can easily move form one place to another and convection is done by actual movement of molecules form hotter to colder part

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9th Class Physics English Medium Chapter 9 Preparation - Set 5

Question # 1

Why metals are good conductors of heat

Ans 1: Metals are good conductors of heat because they have free electrons. These free electrons move with very high velocities within the metals hey carry energy at a very fast rate from hot to cold parts of object

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9th Class Physics English Medium Chapter 9 Preparation - Set 6

Question # 1

For what purpose good conductors are used

Ans 1: Good conductors are used for quick transfer of heat Thus cookers, cooking plates, boiler, radiators and condensers of refrigerators etc. are made of metal.

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9th Class Physics English Medium Chapter 9 Preparation - Set 7

Question # 1

Write use of Styrofoam.

Ans 1: Styrofoam boxes are used to keep food hot or ice cream cold for a long time because Styrofoam is a bad conductor of heat It does not allow heat to leave or enter the box easily

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9th Class Physics English Medium Chapter 9 Preparation - Set 8

Question # 1

We wear whit and light coloured clothes in summer why

Ans 1:
We wear white and light oloured clothes in summer which reflect most of the heat radiation reaching us during the hot day

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9th Class Physics English Medium Chapter 9 Preparation - Set 9

Question # 1

Write the ways by which transfer of heat takes place

Ans 1: Ways of heat transfer Conduction, convection, radiation,
Conduction: The mode of transfer of heat by vibrating atoms and free electrons in solids from hot to cold parts of a body is called conduction of heat
Ans 2: Convection: Transfer of heat by actual movement of molecules from hot place to ca cold place is known as convection.
Ans 3: Radiation: Tradiation is the mode of transfer of heat from one place to another in the form of waves called electromagnetic waves.

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9th class Physics Chapter 9 (English Medium)

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Matric Part 1/9th Class Physics Chapter 9 Short Question Test With Answer for Unit 9 Transfer of Heat

9th Class English Medium Subjects

9th Class Urdu Medium Subjects

Online Short Questions For Chapter 9 "9th Class Physics English Medium Chapter 9 Preparation "

Physics (New Book) - 9th Class Physics English Medium Chapter 9 Preparation

What is greenhouse effect

Define thermal conductivity

Described an experiment of convection.

Define sea breeze how it is cause

Why is land breeze blow from land towards sea

What measurements do you suggest to converse energy in houses

What is the proportionality constant of thermal conductivity

For what purpose good conductors are used

Why conduction of heat does no takes place in gases

What is greenhouse effect?

Prepare Complete Set Wise Questions For Chapter 9 "9th Class Physics English Medium Chapter 9 Preparation "

Set 1

Set 2

Set 3

Set 4

Set 5

Set 6

Set 7

Set 8

Set 9

9th Class Physics English Medium Chapter 9 Preparation - Set 1

What is greenhouse effect

Define thermal conductivity

Described an experiment of convection.

Define sea breeze how it is cause

Why is land breeze blow from land towards sea

What measurements do you suggest to converse energy in houses

What is the proportionality constant of thermal conductivity

For what purpose good conductors are used

Why conduction of heat does no takes place in gases

What is greenhouse effect?

9th Class Physics English Medium Chapter 9 Preparation - Set 2

What is global warming?

Write two uses of non-conductors

Write the ways by which transfer of heat takes place

What is radiation?

Why conduction of heat does not take place in gases

Transfer of Heat.

What is green house effect

Write any twoi factor on which rate of flow of heat depends

Write any two uses of conductors

Write two examples of good and bad conductors each

9th Class Physics English Medium Chapter 9 Preparation - Set 3

Why Styrofoam boxes are used to keep food hot or ice cream for a long time.

How does heat reaches us from the sun?

What causes a glider to remain in air

Give two uses of convection currents

We wear whit and light coloured clothes in summer why

Define thermal conductivity

Write use of Styrofoam.

What is the thermo flask?

Write any two measures to save energy

Differentiate between conductors and insulator

9th Class Physics English Medium Chapter 9 Preparation - Set 4

Why transfer of heat in fluids takes place by convection

How many sides of a Leslie cube are

Why metal are good conductors of heat?

Why conduction of heat does no takes place in gases

Why Styrofoam boxes are used to keep food hot or ice cream for a long time.

Write two consequences of radiations

Define the of flow of heat and write its mathematical form.

Why interior surface of pots made polished

Why we avoid wear dark colure dresses in summer season

Write use of Styrofoam.

9th Class Physics English Medium Chapter 9 Preparation - Set 5

Why metals are good conductors of heat

What is radiation?

What is greenhouse effect