heat transfer
Flashcard
•
Chemistry
•
7th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is heat energy?
Back
Heat energy is the energy that comes from the temperature of matter. It is the energy that is transferred from one body or system to another due to a temperature difference.
2.
FLASHCARD QUESTION
Front
What happens to molecules when they are heated?
Back
When molecules are heated, they move faster and spread apart, which usually causes the substance to expand.
3.
FLASHCARD QUESTION
Front
What is conduction?
Back
Conduction is the transfer of heat through a material without the movement of the material itself, typically occurring in solids.
4.
FLASHCARD QUESTION
Front
What is convection?
Back
Convection is the transfer of heat by the movement of fluids (liquids or gases) where warmer parts of the fluid rise and cooler parts sink.
5.
FLASHCARD QUESTION
Front
What is radiation?
Back
Radiation is the transfer of heat in the form of electromagnetic waves, such as sunlight, which can travel through a vacuum.
6.
FLASHCARD QUESTION
Front
What are convection currents?
Back
Convection currents are the circular motion of fluids caused by the rising of warm fluid and the sinking of cooler fluid.
7.
FLASHCARD QUESTION
Front
How does a hot air balloon work?
Back
A hot air balloon rises because the air inside the balloon is heated, making it less dense than the cooler air outside, creating lift.
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