3 science questions for 8th grade?

Question

How does a refrigerator remove thermal energy from the food stored inside of it?

How does a heat engine use thermal energy to work? Show an energey chain to show energy transformations.

How is a thermostat used to keep room temps. winthin a set range?

Answer 1

shut up emma

Heat engines:

automobile engines-thermal energy from a high heat source is converted into mechanical energy (work) and exhaust is expelled

refrigerator-thermal energy is removed from a cold body (work is required) and transferred to a hot body (the room. Another example is a heat pump.

check out the source below.  Hope this helps a little if anything.