What is the primary function of the vacuum in a thermos flask?
Thermos flask

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Science, Physics, Chemistry
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1st - 6th Grade
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To act as a barrier to heat transfer
To provide structural support
To allow heat to flow freely
To store additional liquids
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the cap of a thermos flask made from materials like cork or plastic?
To reduce the weight of the flask
To enhance the aesthetic appeal
To prevent heat transfer and maintain temperature
To make the flask more durable
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a thermos flask keep iced water cold?
By releasing cold air
By absorbing the cold
By preventing heat from flowing in
By allowing heat to flow in
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What eventually happens to the contents of a thermos flask over time?
They remain at the same temperature indefinitely
They become hotter
Their temperature changes due to heat transfer
They become colder
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main role of a thermos flask?
To reduce the flow of heat energy
To completely stop heat flow
To increase the temperature of its contents
To cool down its contents
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