Heat Transfer

Front

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

Back

By radiation from the Sun.

Front

Which best explains how roasting marshmallows happens?

Back

Heat from the fire is radiated into the marshmallow.

Front

Which best describes heat transfer by radiation? Options: 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.

Back

Cooking a hotdog in a microwave.

Front

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

Back

Brick is heat resistant.

Front

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

Back

Because water expands when frozen.

Front

Which best explains why there are gaps between the concrete sidewalks?

Back

When it's hot the gaps allow expanding without cracking.

Front

What occurs when popcorn kernels are heated in the microwave?

Back

The kernels expand.

Front

Why does a balloon on top of a water bottle expand when the bottle is placed in hot water?

Back

Heat causes gases to expand.

Front

If you cannot open a jar, why will placing the metal lid under hot water help to loosen the lid?

Back

Metals expand when they are heated.

Front

A spoon is placed into a mug of hot coffee. As the spoon sits in the coffee it begins to get warm. The heat from the coffee moves to the cool spoon. The spoon is an example of:

Back

Conductor