Question

target: classify heat transfer as conduction, convection or radiation. (knowledge)
energy worksheet 2: conduction, convection and radiation
in each of the following examples, identify whether heat is being transferred through conduction, convection or radiation. some may have two possible answers. choose the answer that best fits the situation.

1. warming hand over a radiator.
2. eggs cooking in a frying pan.
3. snowman melting in the sun.
4. water boiling in a kettle.
5. warmth from the fireplace circulating through the house.
6. tongue freezing to a metal pole.
7. newt boiling in a hot caldron.
8. ice melting on a hotplate.

Explanation:

• Conduction: Heat transfer through direct contact.
• Convection: Heat transfer through fluid (liquid or gas) movement.
• Radiation: Heat transfer through electromagnetic waves (no medium needed).

1. Warming hand over a radiator: Radiation (heat travels as infrared waves).
2. Eggs cooking in a frying pan: Conduction (direct contact between pan and eggs).
3. Snowman melting in the sun: Radiation (sun's energy as electromagnetic waves).
4. Water boiling in a kettle: Convection (water circulates as it heats).
5. Warmth from the fireplace circulating through the house: Convection (air movement).
6. Tongue freezing to a metal pole: Conduction (direct contact).
7. Newt boiling in a hot caldron: Convection (liquid movement).
8. Ice melting on a hotplate: Conduction (direct contact).

Answer:

1. Radiation
2. Conduction
3. Radiation
4. Convection
5. Convection
6. Conduction
7. Convection
8. Conduction