Question

question 7
chose the correct statement

• heat transfer can happen through conduction, convection, or radiation.
• only solids are capable of transferring heat.
• insulators are materials that allow heat to pass through them easily.

question 8
why do most cooking pans have a plastic handle

• plastic is a good insulator
• plastic is a good conductor
• they are easier to grip
• they prevent popping grease and reduce boiling

Explanation:

For Question 7: Heat transfer has three primary mechanisms: conduction (through direct contact in solids/fluids), convection (through fluid movement), and radiation (via electromagnetic waves, no medium needed). Solids are not the only heat-transferring materials, and insulators resist heat flow, not allow it easily.
For Question 8: Plastic is a thermal insulator, meaning it does not conduct heat well. This prevents the handle from getting too hot to touch during cooking, which is the key functional reason for using plastic handles.

Answer:

Question 7: Heat transfer can happen through conduction, convection, or radiation.
Question 8: Plastic is a good insulator