To solve the problem, we need to identify the type of heat transfer (CONDUCTION, CONVECTION, or RADIATION) in each situation. Let's analyze each scenario step by step:
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1. Heating food in a microwave oven.
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Explanation: A microwave oven uses electromagnetic waves (specifically microwaves) to heat food. These waves penetrate the food and cause the water molecules inside to vibrate, generating heat. This process does not involve direct contact or movement of air.
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Type of Heat Transfer:
RADIATION
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2. The butter on top of the pancake melted.
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Explanation: The butter melts because it is in direct contact with the hot surface of the pancake. Heat is transferred from the pancake to the butter through direct contact.
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Type of Heat Transfer:
CONDUCTION
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3. Your wrinkled shirt flatten out after ironing it.
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Explanation: When you iron a shirt, the iron heats up and transfers heat directly to the fabric through direct contact. This causes the wrinkles to smooth out.
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Type of Heat Transfer:
CONDUCTION
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4. You feel the warmth of the fireplace even if you are sitting on the sofa.
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Explanation: The warmth from the fireplace reaches you without any physical contact. This happens because the fireplace emits infrared radiation, which travels through the air and warms your body.
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Type of Heat Transfer:
RADIATION
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5. You feel hot after reading for a long time under a lamp.
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Explanation: The lamp emits light and heat, which travel through the air as electromagnetic waves (radiation). This heat reaches your body without direct contact.
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Type of Heat Transfer:
RADIATION
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6. Roasting pig over fire.
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Explanation: When roasting a pig over a fire, the heat from the flames directly touches the pig, transferring heat through direct contact. This is an example of conduction.
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Type of Heat Transfer:
CONDUCTION
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Final Answers:
1.
RADIATION
2.
CONDUCTION
3.
CONDUCTION
4.
RADIATION
5.
RADIATION
6.
CONDUCTION
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Boxed Final Answer:
\[
\boxed{
\begin{array}{ll}
1. & \text{RADIATION} \\
2. & \text{CONDUCTION} \\
3. & \text{CONDUCTION} \\
4. & \text{RADIATION} \\
5. & \text{RADIATION} \\
6. & \text{CONDUCTION} \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of heat worksheet.
