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Heat and Energy — Flashcards

ICSE · Class 9 · Physics

52 flashcards for Heat and Energy (ICSE Class 9 Physics) to test yourself on key terms and facts. Sample: "State the definition of heat."

43 questions52 flashcards5 formulas & key relations5 concepts

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A diagram illustrating the molecular motion in a hot body versus a cold body to explain the difference between heat (total internal energy) and temperature (average kinetic energy of molecules). It sh
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52 Flashcards·
Heat and temperature
Card 1Heat and temperature

State the definition of heat.

Answer

Heat is the internal energy of molecules constituting the body. It flows from a hot body to a cold body.

Card 2Heat and temperature

State the definition of temperature.

Answer

Temperature is a quantity which tells the thermal state of a body, that is, the degree of hotness or coldness of the body. It determines the direction of flow of heat when two bodies at different temp…

Card 3Heat and temperature

What is the SI unit of heat?

Answer

The SI unit of heat is joule (J). Heat is a form of energy, so it uses the same SI unit as energy.

Card 4Heat and temperature

What is the relation between calorie and joule?

Answer

1 cal = 4.186 J (or nearly 4.2 J). This means calorie can be converted into joule by multiplying by 4.186.

Card 5Heat and temperature

Convert 2 cal into joule.

Answer

Given: 1 cal = 4.186 J Formula: Energy in J = calories × 4.186 Step 1: 2 cal × 4.186 J/cal = 8.372 J Answer: 8.372 J…

Card 6Heat and temperature

Convert 500 cal into joule.

Answer

Given: 1 cal = 4.186 J Formula: Energy in J = calories × 4.186 Step 1: 500 cal × 4.186 J/cal = 2093 J Answer: 2093 J…

Card 7Heat and temperature

State the relation between joule and erg.

Answer

1 J = 10^7 erg. This is the CGS relation for energy.

Card 8Heat and temperature

How are Celsius and Kelvin temperatures related?

Answer

T K = 273 + t °C Here, T is temperature in kelvin and t is temperature in degree celsius. Example: 25°C = 298 K.

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Frequently Asked Questions

What are the important topics in Heat and Energy for ICSE Class 9 Physics?
Key topics in Heat and Energy include Heat and Temperature, Thermal Expansion and Anomalous Expansion of Water, Hope's Experiment, Consequences of Anomalous Expansion of Water. Study these first, then practise questions on each for Class 9 exams.
How many flashcards are available for Heat and Energy?
There are 52 flashcards for Heat and Energy covering key definitions, facts and ideas. A few sample cards are shown on this page.
How should I revise Heat and Energy for Class 9 exams?
Learn the core ideas first, then work through the 43 practice questions on Heat and Energy. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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