Paheli and Boojho measured their body temperature. Paheli found her's to be 98 . 6 ∘ F and Boojho recorded 37 ∘ C . Which of the following statement is true?

Both have normal body temperature.

Paheli has a higher body temperature than Boojho.

Paheli has a lower body temperature than Boojho.

A circular metal loop is heated at point O as shown in the figure. In which direction would heat flow in the loop?

When the loop is heated at point O , the temperature at O increases. As the loop is made up of metal which is a heat conductor, heat flow will occur from O to R and O to P which are at a lower temperature compared to Q . The heat flow occurs by means of conduction. In other words, the heat will flow in both the direction i.e. from O to P and O to R .

E M B I B E

NCERT Exemplar Science - Class 7>Chapter 4 - Heat>MULTIPLE CHOICE QUESTIONS>Q 2

EASY

7th CBSE

IMPORTANT

Earn 100

A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because

53.7% studentsanswered this correctly

Important Questions on Heat

EASY

7th CBSE

IMPORTANT

NCERT Exemplar Science - Class 7>Chapter 4 - Heat>MULTIPLE CHOICE QUESTIONS>Q 3

Paheli and Boojho measured their body temperature. Paheli found her's to be

98 . 6^{\circ} F

and Boojho recorded

37^{\circ} C

. Which of the following statement is true?

EASY

7th CBSE

IMPORTANT

NCERT Exemplar Science - Class 7>Chapter 4 - Heat>MULTIPLE CHOICE QUESTIONS>Q 6

Figures (

A

,

B

and

C

) show a student reading a doctor’s thermometer. Which of the figure indicates the correct method of reading temperature?

EASY

7th CBSE

IMPORTANT

NCERT Exemplar Science - Class 7>Chapter 4 - Heat>MULTIPLE CHOICE QUESTIONS>Q 7

Figure

(A - D)

shows the readings on four different thermometers. Indicate which of the reading shows the normal human body temperature

EASY

7th CBSE

IMPORTANT

NCERT Exemplar Science - Class 7>Chapter 4 - Heat>VERY SHORT ANSWER QUESTIONS>Q 8

Shopkeepers selling ice blocks usually cover them with jute sacks. Explain why.

EASY

7th CBSE

IMPORTANT

NCERT Exemplar Science - Class 7>Chapter 4 - Heat>VERY SHORT ANSWER QUESTIONS>Q 9

A laboratory thermometer

A

is kept

7 cm

away on the side of the flame while a similar thermometer

B

is kept

7 cm

above the flame of a candle as shown in the figure below.

Question Image

Which of the thermometers, $A$ or $B$ , will show a greater rise in temperature? Give a reason for your answer.

MEDIUM

7th CBSE

IMPORTANT

NCERT Exemplar Science - Class 7>Chapter 4 - Heat>VERY SHORT ANSWER QUESTIONS>Q 10

To keep her soup warm Paheli wrapped the container in which it was kept with a woollen cloth. Can she apply the same method to keep a glass of cold drink cool? Give reason for your answer.

EASY

7th CBSE

IMPORTANT

NCERT Exemplar Science - Class 7>Chapter 4 - Heat>VERY SHORT ANSWER QUESTIONS>Q 11

In a mercury thermometer, the level of mercury rises when its bulb comes in contact with a hot object. What is the reason for this rise in the level of mercury?

EASY

7th CBSE

IMPORTANT

NCERT Exemplar Science - Class 7>Chapter 4 - Heat>SHORT ANSWER QUESTIONS>Q 12

A circular metal loop is heated at point $O$ as shown in the figure.

Question Image