Download App

Heat Science - Heat

Gujarat Board (GSEB) - STD 7 - Science (GSEB - English Medium). 122 questions in this chapter.

Question types

Heat question types

122 questions across 9 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

122
Questions
9
Question groups
5
Question types
Sample Questions

Heat questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ (1 Marks)1 Mark
A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because
  • A
    friction between the layers of newspaper produces heat
  • ✓
    air trapped between the layers of newspaper is a bad conductor of heat
  • C
    newspaper is a conductor of heat
  • D
    newspaper is at a higher temperature than the temperature of the surroundings

Answer: B.

View full solution →
Q 2MCQ (1 Marks)1 Mark
Four arrangements to measure temperature of ice in beaker with laboratory thermometer are shown in figure (a, b, c, d). Which one of them shows the correct arrangement for accurate measurement of temperature?
  • ✓

    Image
  • B

    Image
  • C

    Image
  • D

    Image.

Answer: A.

View full solution →
Q 3MCQ (1 Marks)1 Mark
Boojho has three thermometers as shown in figure. He wants to measure the temperature of his body and that of boiling water. Which thermometer(s) should he choose?
Image
  • ✓
    Thermometers (i) and (iii) for measuring body temperature and (ii) for measuring the temperature of boiling water.
  • B
    Thermometer (i) for measuring both of the temperature.
  • C
    Thermometer (ii) for measuring both of the temperature.
  • D
    Thermometer (iii) for measuring both of the temperature.

Answer: A.

View full solution →
Q 4MCQ (1 Marks)1 Mark
Paheli and Boojho measured their body temperature. Paheli found her to be 98.6°F and Boojho recorded 37°C. Which of the following statements is true?
  • A
    Paheli has a higher body temperature than Boojho.
  • B
    Paheli has a higher body temperature than Boojho.
  • ✓
    Paheli has a higher body temperature than Boojho.
  • D
    Both are suffering from fever.

Answer: C.

View full solution →
Q 6Assertion (A) & Reason (B) MCQ1 Mark
The following question consist of two statement
Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below
Assertion (A) We feel more comfortable in dark coloured clothes in winter season.
Reason (R) Dark coloured clothes reflect most of the heat that falls on them.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • ✓
    A is true but R is false.
  • D
    A is false but R is true.

Answer: C.

View full solution →
Q 7Assertion (A) & Reason (B) MCQ1 Mark
The following question consist of two statement
Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below
Assertion (A) The clinical thermometer has the range of 35°C to 42°C. 
Reason (R) The temperature of human body normally does not go below 35°C or above 42°C.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.

Answer: A.

View full solution →
Q 8Assertion (A) & Reason (B) MCQ1 Mark
The following question consist of two statement
Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below
Assertion (A) Sunlight reaches to the earth by radiation process.
Reason (R) The transfer of heat by radiation does not require any medium.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.

Answer: A.

View full solution →
Q 9Assertion (A) & Reason (B) MCQ1 Mark
The following question consist of two statement
Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below
Assertion (A) We prefer woollen clothes in winter season.
Reason (R) Wool is a poor conductor of heat. It has air trapped in between the fibres.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.

Answer: A.

View full solution →
Q 10Assertion (A) & Reason (B) MCQ1 Mark
The following questions consist of two statements Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below.
Assertion (A) We feel more comfortable in light coloured clothes in the summer.
Reason (R) Light coloured clothes absorb less heat from the sun.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R are true.

Answer: A.

View full solution →
Q 211 Marks Question1 Mark
Boojho now understands why clinical thermometer cannot be used to measure high temperatures. But still wonders whether a laboratory thermometer can be used to measure his body temperature.
View full solution →
Q 221 Marks Question1 Mark
The length of wire PQ In case of A is equal to the diameter of the semi-circle formed by the wire CDE, In case & one pin is attached to each wire with the help of wax as shown in figure. Which pin will fall first? Explain.
Image
View full solution →
Q 241 Marks Question1 Mark
To keep her soup warm, Paheli wrapped the container in which it was kept with a woollen clothes. Can she apply the same method to keep a glass of cold drink cool? Give reason for your answer.
View full solution →
Q 251 Marks Question1 Mark
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?
View full solution →
Q 272 Marks Questions2 Marks
At a camp site, there are tents of two shades. One made with black fabric and the other with white fabric. Which one will you prefer for resting on a hot summer afternoon? Give reason for your choice.
Would you like to prefer the same tent during winter?
View full solution →
Q 282 Marks Questions2 Marks
Observe the given figure, water is being boiled in a pan of wide base.
Image
(i) Which position Por T will feel warmer?
(ii) Fill up the boxes Pand T to indicate the mode of flow of heat to the hand.
View full solution →
Q 292 Marks Questions2 Marks
For setting curd, a small amount of curd is added to warm milk. The microbes present in the curd help in setting if the temperature of the mixture remains approximately between 35°C to 40°C. At places where room temperature remains much below the range, setting of curd becomes difficult. Suggest a way to set curd in such a situation.
View full solution →
Q 302 Marks Questions2 Marks
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 figure. Which of the thermometers A or B will show a greater rise in temperature? Give reason for your answer.
Image
View full solution →
Q 313 Marks Question3 Marks
On last Monday, Pankaj was dealing with immense cough and cold. Besides this, he was suffering from a headache. So, he decided to take a leave on that day so that he could take some rest at his home. After one hour he thought to check his fever through a clinical thermometer, so before using it, he washed it and started shaking it very fastly in his hand, so that the mercury level of thermometer gets reduced. At the same time, his elder brother Vishwas scold him and suggested him to shake the thermometer slowly.
(i) State some precautionary measures while checking the fever through a clinical thermometer.
(ii) Mention the values showed by the elder brother of Pankaj (i.e. Vishwas).
View full solution →
Q 36Match the Following.4 Marks
Column IColumn II
(a) Conduction(i) Wood, plastic, wool, air, water
(b) Convection(ii) Requires no medium
(c) Radiation(iii) Solids
(d) Conductors(iv) Metals
 (v) Liquids
View full solution →
Q 37Match the Following.4 Marks
Column IColumn II
(a) Land breeze blows during(i) Summer
(b) Sea breeze blows during(ii) Winter
(c) Dark coloured clothes are preferred during(iii) Day
(d) Light coloured clothes are preferred during(iv) Night
View full solution →
Q 385 Marks Questions5 Marks
The question assesses the student's ability to identify and explain heat transfer process in real life situations.
Image
(i) By what method of heat transfer does heat energy from the sun reach the earth?
(ii) Select the process of heat transfer which causes a breeze (wind) over land and sea. 
(a) Conduction $\quad$ (b) Convection $\quad$ (c) Radiation
(iii) Explain in term of heat transfer, why houses at coastal area often have their windows facing the sea?
(iv) Suggest two domestic insulation techniques that the houses build at coastal areas could have to maintain constant temperatures.
View full solution →
Q 395 Marks Questions5 Marks
A student took hot milk and poured it into four containers at same level as shown below. Which container will cause temperature of hot milk to drop at the slowest rate?
Image
View full solution →
Q 405 Marks Questions5 Marks
Govind is a student. He set up an experiment as shown here.
Image
He placed the lighted candle below the iron rod at position Q He used the same amount of wax to hold all the drawing pin at positions A, B, C, X, Y and Z on the rod. Arrange the drawing pin according to the time, they take to drop from the rod, from the last to the first.
View full solution →
Browse all question groups ↑

Generate a Heat paper free

Pick question groups from the list above, set marks and difficulty, and export a branded PDF with step-by-step answer keys. First 3 chapters free — no signup.

Download App
Generate Paper FreeAll Science chapters