Energy Transfer Quiz

What is the original source of the most of the energy that people use?

• By radiation from the sun.

• By convection from the sun.

• By radiation from the Earth's core.

• Conduction from Earth's core.

Which best explains how this roasting marshmallows happens?

• Heat from the fire is conducted into the marshmallow.

• Heat from the fire is radiated into the marshmallow.

• The coolness of the marshmallow is conducted into the fire.

• The coolness of the marshmallow is radiated into the fire.

Which best describes heat transfer by radiation?

• A slice of bacon frying in a pan.

• A pot on a stove boiling water.

• Cooking a hotdog in a microwave.

• A hot air balloon.

When choosing materials to build a fireplace, why is brick a better choice than metal?

• Brick is a conductor.

• Brick is heat resistant.

• Metal is a conductor.

• Meat is heat resistant.

What enables fireman to enter buildings that are on fire and return from them safely?

• Convection cells keep fire away.

• The heat makes the building expand so there is no more room.

• Fireman wear heat resistant suits.

• They are really fast.

Why should space be left at the top of the plastic bottle when filling with water and then freeze?

• Because water expands when frozen.

• Because water contracts when frozen.

• Because plastic contracts when frozen.

• Because plastic expands when frozen.

Popcorn is made from corn kernels. What happens when kernels are heated in a microwave?

• The kernels expand.

• The kernels dissolve.

• The kernels become hard and brittle.

• The kernels stick together to form ball.

Which of the following best describes CONVECTION?

• When heat is transferred through waves.

• When heat is transferred through objects that are touching.

• The movement of gas or liquid in which warmer parts move up and the colder parts moves down.

What kind of heat transfer is occurring when the sun warms the sand?

• Conduction

• Convection

• Radiation

• All of them

Which of the following is an example of convection?

• Hair dryer is drying up your hair

• When a car engine turns hot after being turned on.

• A spoon placed in the cup filled with cold coffee.

• Boiling spaghetti noodles in water.