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Chapters
2: Motion
3: Fluids
4: Electric charge and Electric current
5: Magnetism and Electromagnetism
6: Light
▶ 7: Heat
8: Sound
9: Universe
10: Matter Around Us
11: Atomic Structure
12: Periodic Classification of Elements
13: Chemical Bonding
14: Acids, Bases and Salts
15: Carbon and its Compounds
16: Applied Chemistry
17: Animal Kingdom
18: Organisation of Tissues
19: Plant Physiology
20: Organ Systems in Animals
21: Nutrition and Health
22: World of Microbes
23: Economic Biology
24: Environmental Science
25: Computer – LibreOffice Impress
![Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 7 - Heat - Shaalaa.com](/images/science-english-class-9-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 7 - Heat")
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Solutions for Chapter 7: Heat
Below listed, you can find solutions for Chapter 7 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 9 TN Board.
Samacheer Kalvi solutions for Science [English] Class 9 TN Board 7 Heat Exercise [Pages 88 - 89]
Choose the correct answer.
Calorie is the unit of ______.
heat
work
temperature
food
SI unit of temperature is ______.
fahrenheit
joule
celsius
kelvin
Two cylindrical rods of same length have the area of cross section in the ratio 2:1. If both the rods are made up of same material, which of them conduct heat faster?
Both rods
Rod-2
Rod-1
None of them
In which mode of transfer of heat, molecules pass on heat energy to neighbouring molecules without actually moving from their positions?
Radiation
Conduction
Convection
Both B and C
A device in which the loss of heat due to conduction, convection and radiation is minimized is ______.
solar cell
solar cooker
thermometer
thermos flask
Fill in the blanks.
The fastest mode of heat transfer is ______.
During day time, air blows from______ to______
Liquids and gases are generally ______ conductors of heat.
The fixed temperature at which matter changes state from solid to liquid is called ______.
Assertion and reason type question.
Assertion: Food can be cooked faster in vessels with copper bottom.
Reason: Copper is the best conductor of heat.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If assertion is false but reason is true.
Assertion: Maximum sunlight reaches earth’s surface during the noon time.
Reason: Heat from the sun reaches earth’s surface by radiation.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If assertion is false but reason is true.
Assertion: When water is heated up to 100°C, there is no raise in temperature until all water gets converted into water vapour.
Reason: Boiling point of water is 10°C.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If assertion is false but reason is true.
Answer briefly.
Define conduction.
Ice is kept in a double-walled container. Why?
How does the water kept in an earthen pot remain cool?
Differentiate convection and radiation.
Why do people prefer wearing white clothes during summer?
What is specific heat capacity?
Define thermal capacity.
Define specific latent heat capacity
Answer in detail.
Explain convection in daily life.
What are the changes of state in water? Explain.
How can you experimentally prove water is a bad conductor of heat? How is it possible to heat water easily while cooking?
Numerical Problem.
What is the heat in joules required to raise the temperature of 25 grams of water from 0°C to 100°C? What is the heat in Calories? (Specific heat of water = `(4.18"J")/("g"°"C")`
Numerical Problem.
What could be the final temperature of a mixture of 100 g of water at 90 °C and 600g of water at 20°C.
Numerical Problem.
How much heat energy is required to change 2 kg of ice at 0°C into water at 20°C? (Specific latent heat of fusion of water = 3,34,000 J/kg, Specific heat capacity of water = 4200 JKg–1K–1).
Solutions for 7: Heat
Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 7 - Heat
Shaalaa.com has the Tamil Nadu Board of Secondary Education Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Samacheer Kalvi solutions for Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education 7 (Heat) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. Samacheer Kalvi textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Science [English] Class 9 TN Board chapter 7 Heat are Heat and change of physical state, Heat and Its Unit, Effects of Heat, Transfer of Heat, The Temperature and a Thermometer, Specific Heat Capacity, Thermal Capacity (Heat Capacity), Concept of Melting (Fusion), Concept of Boiling (Vaporization), Concept of Sublimation, Concept of Freezing (Solidification), Concept of Condensation (Liquefaction), Concept of Desublimation (Deposition), Concept of Evaporation, Latent Heat and Specific Latent Heat, Scales of Thermometers, Absolute Zero, Conduction, Convection, Radiation.
Using Samacheer Kalvi Science [English] Class 9 TN Board solutions Heat exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Science [English] Class 9 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
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