Class 7 Science Chapter 4 MCQ (Multiple Choice Questions) of Heat. These Multiple Choice Questions with four choices contains about 120 questions divided into 12 sets in the format of test series, updated for new academic session 2022-23. All the questions are taken form NCERT Textbook and Exemplar books only. It covers the entire chapter 4 of grade 7 Science including all important terms.
Class 7 Science Chapter 4 MCQ for 2022-23
|Contents:||Multiple Choice Questions – MCQ Tests|
Class 7 Science Chapter 4 MCQ Tests for 2022-23
Class 7 Science Chapter 4 MCQ are given below with explanation of each answer. There are sufficient number of tests to practice chapter 4 of 7th Science. These tests make a student confident about the concepts related to standard 7 Science. Give test and practice with important questions if required. If you have more questions to ask, please visit to Discussion Forum.
Paheli and Boojho measured their body temperatures. Paheli found her to be 98.6 degree Fahrenheit and Boojho recorded 37° Celsius. Which of the following statement is true?
In which of the statement is or are correct about “thermometer”?
Boojho wonders why the level of mercury should change at all when the bulb of the thermometer is brought in contact with another object.
Cooking utensils are made of metals because they are
Wooden spoon is used to prepare vegetables its other end
Which of the following is a poor conductor of heat?
Who invented thermos flask?
Which of the following statement is or are incorrect?
The device which is used to measure the degree of coldness or hotness of an object.
Paheli wants to know about “heat”. Heat is
In which of the following statement is or are incorrect?
Boojho wants to know that why it is advised to use digital thermometer?
“We should avoid keeping the thermometer in the sun or near a flame”: Why?
In which of the statement is or are correct?
Paheli wants to know in which conditions clinical thermometer can be break?
Boojho has three thermometers. He wants to measure the temperature of his body and that of boiling water. Which thermometer(s) should he choose?
Paheli wants to measure the body temperature of Boojho. She got 36.4 degree Celsius, 37.4 degree Celsius and 36.6 degree Celsius in first, second and third times respectively. What is the average body temperature of Boojho?
An iron ball at 40 degree Celsius is dropped in a mug containing water at 40 degree Celsius. The heat will
Why should we avoid keeping the thermometer in the sun or near a flame?
Read the following statement carefully and choose which statement(s) are correct?
It is advised not to hold the thermometer by its bulb while reading it
At a campsite there are tents of three shades. One made with black fabric and other is white fabric and one is black and white combination. Which will you prefer for resting on a hot summer afternoon?
One litre of water at 30 degree Celsius is mixed with one litre of water at 50 degree Celsius. The temperature of the mixture will be
Thermos flask is a special type of vessel which keeps hot liquids hot and cold liquids cold. It is made in such a way as to reduce the loss of heat by conduction, convection and radiation to minimum. It is a double walled glass vessel. The space between the two walls has no air in it. It is a vacuum indeed. The inside of the outer wall and outside of the inner wall are brightly polished with silver. The whole system is enclosed in a metal case. It is supported on corks or rubber pieces on all sides. The mouth too is closed with a cork.
How it Works
The vacuum between the walls prevents the flow of heat of conduction and convection. As for radiation, the brightly polished outer surface of the inner wall is a slow radiator of heat. The little heat that radiates is reflected back by the inner brighter surface of the outer wall. So, the hot liquid remains hot for a long time in the flask.
What is thermometer in Class 7 Science Chapter 4?
The device which measures the degree of hotness is called thermometer.
Which type of surfaces are good absorbers of heat as in 4th Chapter of Class 7 Science?
Black and rough surfaces are good absorbers of heat.
Which type of surfaces are poor absorbers of heat according to 7th Science ch. 4?
White and smooth surfaces are poor absorbers of heat.
Which scale is used for measuring heat in scientific work in Chapter 4 of 7th Science?
Temperature is generally measured in Celsius or Fahrenheit scale. Kelvin scale is used for scientific work.