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Mini-Quiz: Thermos Container Uses Thermal Insulation

by Ron Kurtus (revised 8 November 2014)

Take this Mini-Quiz to check your understanding of the lesson material.

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1. What makes a material a good thermal insulator?

It conducts heat by conduction, convection and radiation

It barely allows heat to move through it by conduction

It is made of silver

2. Why must the cap be made of insulating material?

Otherwise heat would escape through the cap

To prevent dirt from getting inside the thermos

No one really knows the reason for that

3. Why is the inside of a vacuum thermos silvered?

Silver is one of the best thermal insulators

To prevent the vacuum from escaping

To prevent heat transfer by radiation through the vacuum

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.

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Where are you now?

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Physics topics

Mini-Quiz: Thermos Container Uses Thermal Insulation

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Thermal Energy topics

• Thermal Energy
• Thermal Potential Energy

Temperature

• Temperature
• Temperature Measurement: Thermometers
• Temperature Scales
• Lower and Upper Temperature Limits
• Equations for Temperature Limits

Heating

• Heat
• Heat Transfer
• Heat Transfer with Hot Coffee
• Heat Transfer on Earth
• Heating a Greenhouse with Infrared Radiation
• Heat Energy Required to Turn Ice into Steam
• Mpemba Effect: Hot Water Freezes before Cold

Thermal insulation

• Thermal Insulation
• Thermos Container Uses Thermal Insulation

Thermodynamics

• Thermodynamics

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