NCERT Class 7 Science Chapter 4 Heat Extra Questions and Answers
Class 7 Science Chapter 4 Extra Questions and Answers – Heat. Here in this Page Class VII Students can Learn Extra Questions & Answer 6th Chapter Science fully Inside.
We Provided Here Heat Science Chapter 4 Long Answer Type Question, Very Short Type Questions (VSA) / MCQ Type Questions, Short Type Questions (SA).
Class 7 Science Chapter 4 Extra Question with Answer – Heat
Science Chapter 4 Heat Class 7 Inside 5 Marks, 3 marks, 2 Marks & And 1 Marks Important Questions and Answers.
1) Fill in the blanks:
a) The normal temperature of human body is ___.(37°C)
b) ____ is a conductor of heat.(Aluminum)
c) Sea breeze blows during ____.(Day)
d) Dark-colored clothes are preferred during ____.(Winter)
2) Multiple choice questions:
a) A clinical thermometer reads temperature from ____?
a) 10°C to 110°C b) 35°C to 42°C
Ans. b) 35°C to 42°C
b) The temperature is measured by ____?
a) Scale b) Thermometer
Ans. b) Thermometer
c) ____ is an insulator?
a) Aluminum b) Wood c) Iron
Ans. b) Wood
d) Land breeze blows during ____?
a) Day b) Night
Ans. b) Night
3) Answer the following questions:
a) What is temperature? Which type of thermometer is used to measure our body temperature?
Ans. A reliable measure of the hotness of an object is its temperature.
Clinical thermometeris used to measure our body temperature.
b) Why do we feel more comfortable in light-colored clothes during summer? How do woolen clothes keep us warm during winter?
Ans. Light-colored objects absorb less heat than the dark-colored objects. That is the reason we feel more comfortable in light-colored clothes during summer.
Woolen clothes keep us warm during winter because wool is a poor conductor of heat and it has air trapped in between the fibers. This air prevents the flow of heat from our body to the cold surroundings.
c) Which type of thermometer is used to measure the temperature of boiling water? What is the range of this thermometer?
Ans. Laboratory thermometeris used to measure the temperature of boiling water.
The range of this thermometer is generally from-10°C to 110°C.
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d) What is convection? Give one example.
Ans. The process by which the heat is transferred in liquids and gases, is called convection.
The air near the heat source gets hot and rises. The air from the sides comes in to take its place. In this way the air gets heated. This mode of heat transfer is an example of convection.
4) Match the following:
Column I Column II
a) Light-colored clothes are preferred during I) Mercury
b) The temperature is measured by II) Conduction
c) Conductor of heat III) summer
d) The substance is used in thermometer IV) Thermometer
e) The heat is transferred in solid by the process of V) Iron
Ans. a) – III), b) – IV), c) – V), d) – I), e) – II).
5) Mark your answer as per the codes provide below:
a) A: Copper is a poor conductor of heat.
R: Copper allows heat to pass through it easily.
I.) Both A and R are true and R is the correct explanation of A.
II.) Both A and R are true but R is not the correct explanation of A.
III.) A is true but R is false.
IV.) A is false but R is true.
V.) Both A and R are false.
Ans. IV. A is false but R is true.
b) A: From the sun the heat cannot reach to us by process of conduction or convection.
R: There is no medium such as air in most part of the space between the earth and the sun.
I.) Both A and R are true and R is the correct explanation of A.
II.) Both A and R are true but R is not the correct explanation of A.
III.) A is true but R is false.
IV.) A is false but R is true.
V.) Both A and R are false.
Ans. I. Both A and R are true and R is the correct explanation of A.
Case Study Questions
6) The materials which allow heat to pass through them easily are conductors of heat. For examples, aluminum, iron and copper. The materials which do not allow heat to pass through them easily are poor conductors of heat such as plastic and wood. Poor conductors are known as insulators.
a) What are insulators? Give two examples.
Ans. The materials which do not allow heat to pass through them easily are insulators.
Example – Wood and plastic.
b) ____ is a poor conductor of heat. (Air)
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