NCERT Solutions for Class 7 Science Chapter 4: Heat

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NCERT Solutions for Class 7 Science Chapter 4 Heat are provided in the article below. The important topics that are included in this chapter are:

Hot and Cold
Measuring Temperature
Laboratory Thermometer
Transfer of Heat

Download PDF: NCERT Solutions for Class 7 Science Chapter 4 Heat

NCERT Solutions for Class 7 Science Chapter 4

NCERT Solutions for Class 7 Science Chapter 4 Heat are provided in the PDF below:

Class 7 Science Chapter 4 Heat: Important Topics

Heat is one of the essential forms of energy for the survival of life on earth. Transfer of heat takes place from one body to another due to differences in temperature as per thermodynamics. We use heat energy for various activities like cooking, ironing, transportation, recreation, etc. Temperature is the measure of the hotness or coldness of the body. Celsius (C) or Fahrenheit (F) scale, or in Kelvins (K).

Measuring Temperature

Temperature measurement is referred to as the process of measuring a current local temperature for immediate or later evaluation. Temperature is measured with the help of a device called a thermometer. The three units in which temperature is measured are Celsius, Fahrenheit, and Kelvin. Hence, there are three different scales for measuring temperature.

Laboratory Thermometer

A laboratory thermometer, which is used for measuring temperatures other than the human body temperature, is colloquially known as the lab thermometer. It ranges from -10˚C to 110˚C. Laboratory thermometers are designed for lab purposes such as checking the boiling point, freezing point, or temperature of other substances.

Transfer of Heat

Heat transfer, any or all of several kinds of phenomena, is considered a mechanism, that conveys energy and entropy from one location to another. The specific mechanisms are usually referred to as convection, thermal radiation, and conduction.

Chapter Related Links:

Heat Capacity	Hess’s Law of Constant Heat Summation	Heat engines
Latent Heat	Specific heat capacity	Heat transfer

Class 7 Science Study Guides:

CBSE Class 7 Science NCERT Textbook	NCERT Solutions	CBSE Class 7 Science Sample Paper

CBSE X Related Questions

1.
The reasons for excessive generation of wastes are:
(i) Use and throw policy.
(ii) Increased availability of packaged food.
(iii) Increased construction wastes.
(iv) Non-sorting of dry and wet wastes

(i), (iii) and (iv)
(i), (ii) and (iii)
(i), (ii), (iii) and (iv)
(ii), (iii) and (iv)

View Solution

2.
Assertion (A): Reflex actions do not involve thinking.
Reason (R): Most reflex actions are controlled by the spinal cord.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

View Solution

3.
(a) Study the given electric circuit in which 2 A electric current is flowing between points X and Y.

(i) Using the battery, key, voltmeter and ammeter in this given electric circuit, redraw a circuit diagram in which 2 \(\Omega\) and 4 \(\Omega\) resistors are connected between X and Y in parallel combination.
(ii) Circuit drawn by you, in which resistors are connected in parallel combination, calculate the electric current flowing through 4 \(\Omega\) resistor.

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4.
Rays from the sun converge at a point 25 cm behind a convex lens. The distance at which an object be placed in front of the lens to get a virtual image, is:

20 cm
40 cm
50 cm
More than 50 cm

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5.
When you look at an object very close to your eyes, the:

Ciliary muscles of your eye contract and the eye lens becomes thick.
Ciliary muscles of your eye get relaxed and the eye lens becomes thick.
Ciliary muscles of your eye contract and the eye lens becomes thin.
Ciliary muscles of your eye get relaxed and the eye lens becomes thin.

View Solution

6.
What is the function of diaphragm in human respiratory system ? Where is it present in human body ?

View Solution

NCERT Solutions for Class 7 Science Chapter 4: Heat

NCERT Solutions for Class 7 Science Chapter 4

Class 7 Science Chapter 4 Heat: Important Topics

Measuring Temperature

Laboratory Thermometer

Transfer of Heat

CBSE X Related Questions

1.
The reasons for excessive generation of wastes are:
(i) Use and throw policy.
(ii) Increased availability of packaged food.
(iii) Increased construction wastes.
(iv) Non-sorting of dry and wet wastes

2.
Assertion (A): Reflex actions do not involve thinking.
Reason (R): Most reflex actions are controlled by the spinal cord.

4.
Rays from the sun converge at a point 25 cm behind a convex lens. The distance at which an object be placed in front of the lens to get a virtual image, is:

5.
When you look at an object very close to your eyes, the:

6.
What is the function of diaphragm in human respiratory system ? Where is it present in human body ?

Similar Science Concepts

Comments

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NCERT Solutions for Class 7 Science Chapter 4: Heat

NCERT Solutions for Class 7 Science Chapter 4

Class 7 Science Chapter 4 Heat: Important Topics

Measuring Temperature

Laboratory Thermometer

Transfer of Heat

CBSE X Related Questions

1.The reasons for excessive generation of wastes are: (i) Use and throw policy. (ii) Increased availability of packaged food. (iii) Increased construction wastes. (iv) Non-sorting of dry and wet wastes

2.Assertion (A): Reflex actions do not involve thinking. Reason (R): Most reflex actions are controlled by the spinal cord.

4.Rays from the sun converge at a point 25 cm behind a convex lens. The distance at which an object be placed in front of the lens to get a virtual image, is:

5.When you look at an object very close to your eyes, the:

6.What is the function of diaphragm in human respiratory system ? Where is it present in human body ?

Similar Science Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
The reasons for excessive generation of wastes are:
(i) Use and throw policy.
(ii) Increased availability of packaged food.
(iii) Increased construction wastes.
(iv) Non-sorting of dry and wet wastes

2.
Assertion (A): Reflex actions do not involve thinking.
Reason (R): Most reflex actions are controlled by the spinal cord.

4.
Rays from the sun converge at a point 25 cm behind a convex lens. The distance at which an object be placed in front of the lens to get a virtual image, is:

5.
When you look at an object very close to your eyes, the:

6.
What is the function of diaphragm in human respiratory system ? Where is it present in human body ?