7th Standard Syllabus & Materials
7th Standard
Tamilnadu 7th Standard Maths T2 - родроХро╡ро▓рпН роЪрпЖропро▓ро╛роХрпНроХроорпН Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - родроХро╡ро▓рпН роЪрпЖропро▓ро╛роХрпНроХроорпН Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - ро╡роЯро┐ро╡ро┐ропро▓рпН Important Questions And Answers Study Material - QB365 Set C
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - ро╡роЯро┐ро╡ро┐ропро▓рпН Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - ро╡роЯро┐ро╡ро┐ропро▓рпН Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - роЗропро▒рпНроХрогро┐родроорпН Important Questions And Answers Study Material - QB365 Set C
Published on: 04/02/2020
7th Standard Science Term 2 - Heat and Temperature Chapter Important Questions
Download Tamil Nadu 7th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
The body temperature of a healthy man is; ________.
00C
370C
980C
1000C
2.
In thermometer when bulb comes in contact with hot object, liquid inside it ________.
expands
contracts
remains same
none of above
3.
International unit of measuring temperature is _______.
Kelvin
Fahrenheit
Celsius
Joule
4.
Heat energy transfer from ________ to ______.
5.
At room temperature Mercury is in _______ state.
6.
Doctor uses _________ thermometer to measure the human body temperature.
7.
A clinical thermometer is not used to measure the temperature of air, why?
8.
Jyothi was prepared to measure the temperature of hot water with a clinical thermometer. Is it right or wrong? Why?
9.
Temperature of Srinagar (J&K) is — 40C and in Kodaikanal is 30C which of them has greater temperature? What is the difference between the temperatures of these two places?
10.
Swathi kept a laboratory thermometer in hot water for some time and took it out to read the temperature. Ramani said it was a wrong way of measuring temperature. Do you agree with Ramani? Explain your answer.
11.
Why do we use Mercury in thermometers? Can water be used instead of mercury? What are the problems in using it?
12.
State the similarities and differences between the laboratory thermometer and the clinical thermometer.
13.
Draw the diagram of a clinical thermometer and label its parts.
1.
(b)
370C
2.
(a)
expands
3.
(a)
Kelvin
4.
( )
high temperature to low temperature
5.
( )
Liquid
6.
( )
Clinical
7.
Gas molecules are randomly moved. So it is not possible to measure temperature of air by clinical thermometer.
8.
It is wrong. Clinical thermometer indicates only 35°C to 42°C. So hot water is greater than 42°C. So it is wrong.
9.
Kodaikanal temperature is greater. The different temperature is
-4°C + 3°C = 7°C
10.
Yes, Ramani's statement is correct. I agree Ramani statement. because laboratory thermometer has no kink. When thermometer is taken out from the hot water, the mercury level will fall. We can't measure the correct temperature.
11.
a) Its expansion is uniform (for equal amounts of heat it expands by equal length)
b) It is opaque and shining
c) It is a good conductor of heat.
d) It does not stick to the sides of the glass tube.
e) So mercury is used in the thermometer
f) Water cannot used in thermometer.
1) Its expansion is not in uniform.
2) It is stick to the sides of the glass tube.
12.
Difference between clinical and laboratory thermometer
| Clinical Thermometer | Laboratory Thermometer |
| Clinical thermometer is scaled from \(35^{\circ} \mathrm{C}\) to \(42^{\circ} \mathrm{C}\) or from \(94^{\circ} \mathrm{F}\) to \(108^{\circ} \mathrm{F}\) | Laboratory thermometer is generally scaled from \(-10^{\circ} \mathrm{C}\) to \(110^{\circ} \mathrm{C}\). |
| Mercury level does not fall on its own, as there is a kink near the bulb to prevent the fall of mercury level. | Mercury level falls on its own as no kink is present. |
| Temperature can be read after removing the thermometer from armpit or mouth. | Temperature is read while keeping the thermometer in the source of temperature e.g. a liquid or any other thing. |
| To lower the mercury level jerks are given. | No need to give jerk to lower the mercury level. |
| It is used for taking the body temperature | It is used to take temperature in laboratory. |
13.
7th Standard Syllabus & Materials
7th Standard
Tamilnadu 7th Standard Maths T2 - роЗропро▒рпНроХрогро┐родроорпН Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - роЗропро▒рпНроХрогро┐родроорпН Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - роЕро│ро╡рпИроХро│рпН Important Questions And Answers Study Material - QB365 Set C
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - роЕро│ро╡рпИроХро│рпН Important Questions And Answers Study Material - QB365 Set B
Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
