You're going on a picnic and you want to take along a hot drink, so you put it in a thermos so it will stay hot. Or maybe it's a hot day and you put a cold drink or water in a thermos to keep it cold. Have you ever wondered how a thermos can keep things both hot or cold? Take this quiz to see how much you know about your thermos.
What does the concept of thermodynamics refer to?
shivering to keep warm
insulation on an airplane
What is heat anyway?
movement of atoms
radiation from the sun
lighting a fire
What factor effects the amount of heat created?
At what temperature is there no atomic movement?
at freezing point
How is heat transferred?
What does the process of conduction refer to?
transfer of heat
transfer of cold
transfer of electricity
Which of the following materials is a good conductor?
Infrared radiation is a form of _____?
What color best absorbs infrared radiation?
How much of the sun's energy that reaches the Earth is infrared radiation?
Which of the following are affected by the process of convection?
both of the above
A good thermos will _____the transfer of heat by conduction, radiation and convection.
Which method does a thermos use to reduce heat?
A good way to make your own thermos would be to surround a jar with which of the following?
Why is a vacuum a better way of insulating?
Foam is hard to come by.
Heat is sucked away.
There are no atoms in a vacuum.
Inside a thermos there is a glass envelope which is surrounded by a vacuum. The glass is silvered, making it like a _____?
Why do things in a thermos lose their heat?
because the vacuum is not perfect
because the cap allows heat to escape
both of the above
How does a thermos know if you have hot or cold food inside?
It has a sensor inside.
You can only use it once for hot food.
It doesn't know.
It is not recommended to encase the glass center of a thermos in _____.
In outer space, where there is a vacuum, how does a space shuttle get rid of its heat?