Question

select all the correct answers.
camille and her friends enjoy experimenting with different foods. during a camping trip, they decide to fry bacon using nothing more than hot rocks. camille heats a rock in the campfire for 30 minutes, and then removes it with tongs. she greases the rock and lays the bacon strips directly on it. the bacon turns out great, and the girls enjoy the food. which two sentences accurately describe the girls experience with heat transfer?

• heat was transferred from the fire to the rock.
• the girls cooked the bacon using convection currents.
• the bacon and the fire were in thermal equilibrium.
• the bacon lost energy to the rocks as they got warmer.
• the girls used conduction to cook the bacon.

Explanation:

1. Analyze "Heat was transferred from the fire to the rock": Fire heats the rock, so heat transfer from fire to rock (conduction/radiation) occurs. Correct.
2. Analyze "The girls cooked the bacon using convection currents": Convection needs fluid movement; here, bacon is on a rock (conduction), so this is wrong.
3. Analyze "The bacon and the fire were in thermal equilibrium": Fire is much hotter than bacon, so no equilibrium. Wrong.
4. Analyze "The bacon lost energy to the rocks as they got warmer": Bacon gains heat from the rock (rock is hotter), so bacon gains, not loses. Wrong.
5. Analyze "The girls used conduction to cook the bacon": Bacon is in direct contact with the hot rock, so heat transfer by conduction. Correct.

Answer:

• Heat was transferred from the fire to the rock.
• The girls used conduction to cook the bacon.