Heat and Energy: What Is Energy?

The video explains how energy is used in various activities, such as construction work, and is present in everyday environments. It defines energy as the ability to do work or cause change, illustrating this with examples like a ball being hit by a racket or a hammer driving a nail. The video also discusses how energy is transferred between objects and can cause changes, such as heat melting ice.

Which of the following activities is NOT mentioned as using energy in the video?

• Hammering nails

• Cutting wood with a saw

• Boring through wood with a drill

• Swimming in a pool

What is energy defined as in the video?

• The ability to produce sound

• The ability to generate electricity

• The ability to do work or cause change

• The ability to create matter

According to the video, when does work occur?

• When energy is created

• When energy is stored

• When energy causes an object to move

• When energy is destroyed

Which example is used in the video to illustrate energy transfer?

• A river flowing

• A tree growing

• A ball being hit by a tennis racket

• A car accelerating

What change does energy cause in the example of heat in the video?

• Metal rusting

• Wood burning

• Water boiling

• Ice melting