Thermal energy transfer quick check answers
1. Air will move from ___
Answer: area X to area Z
2. Which statement best explains the temperature difference?
Answer: Warm air rises by convection to the upstairs.
3. The transfer of heat by direct contact is called ____
Answer: Conduction
4. Which option is an example of heat transfer by conduction?
Answer: Person getting warm from an electric blanket
Hope this helps! 😊
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Great job! Your answers are correct. Here's an explanation for each question:
1. Air will move from area X to area Z.
To determine the direction of air movement, you need to understand the concept of air pressure. Air moves from areas of higher pressure to areas of lower pressure. Therefore, in this case, since area Z has lower pressure compared to area X, air will move from area X to area Z.
2. Warm air rises by convection to the upstairs.
This statement explains the temperature difference by referring to convection, which is the transfer of heat through the movement of fluids (liquid or gas). Warm air is less dense than cold air, so it rises while displacing the colder air downwards. This creates a convection current, which is why warm air rises, ultimately leading to the temperature difference between the upstairs and downstairs.
3. The transfer of heat by direct contact is called conduction.
Conduction is the transfer of thermal energy through direct contact between objects or substances that are at different temperatures. When objects are in contact, the hotter object transfers its thermal energy to the colder one. In this case, heat is transferred from the hotter object to the colder one by conduction.
4. Person getting warm from an electric blanket is an example of heat transfer by conduction.
In this example, the heat is transferred from the electric blanket to the person by direct contact. When the electric blanket is turned on, it produces heat through conduction, and when the person lies on the blanket, the heat is transferred from the blanket to their body through direct contact. This demonstrates heat transfer by conduction.