"Electricity and Energy" Energy PPT Courseware 2

"Electricity and Energy" Energy PPT Courseware 2

Glossary

When electrical appliances have electricity, they can perform various "works" - do various sports or emit light, sound, heat... We call this energy of electricity electrical energy.

There are other forms of energy, such as heat energy, light energy, sound energy... What "work" can these energies do?

What objects "quietly" store energy? Where does the energy for our body movements come from?

Food and gasoline store energy, which is chemical energy

Knowledge cards

Energy comes in different forms such as electrical energy, thermal energy, light energy, sound energy, etc. Moving objects also have energy, called kinetic energy. (Also called mechanical energy) Energy is also stored in fuel, food and some chemicals, called chemical energy.

Any object requires energy to work. Without energy, there would be no movement and change in nature, and there would be no life.

What household appliances do we have in our home? What kind of work can be done? What form of energy is electrical energy converted into during work?

After investigating, record them in the table below.

Summary

All electrical appliances are electrical energy converters that can convert input electrical energy into other forms of energy.

People use electricity to conveniently obtain the power they need, as well as the light, heat, sound and magnetism they need... Through the wonderful conversion between electrical energy and other energies, our production and life have become more and more convenient.

Do it

1. How do we feel when we rub our hands against each other?

2. Bend a section of wire repeatedly and then touch the wire. How do you feel?

How is energy transformed during these processes?

Class summary

1. Energy comes in many forms such as electricity, heat, sound, light, etc. Energy is also stored in food and fuel.

2. Electrical energy can be converted into other forms of energy, and other different forms of energy can also be converted into each other.

Test questions in class

1. True or False Questions (mark √ if correct, × if incorrect)

1. Sound, light and heat are not energy. ( )

2. The human body requires energy to perform various activities, and this energy is obtained from food. ( )

3. The growth of animals and plants does not require energy. ( )

4. Food undergoes chemical changes in the human body to maintain body temperature. Able to move, food also has energy. ( )

5. Energy can be converted from one form to another through some object. ( )

6. The hair dryer can only output one type of energy. ( )

7. Energy can be converted. The crane converts electrical energy into mechanical energy ( )

8. The energy possessed by objects related to motion is called mechanical energy. ( )

2. Multiple choice questions

1. The following electrical appliances only convert electrical energy into heat energy ( )

A. Electric light B. Electric oven C. TV D. Air conditioner

2. Food and gasoline are stored in ( )

A. Light energy B. Heat energy C. Electric energy D. Chemical energy

3. Which of the following statements is wrong ( )

A. The energy for our body movement is converted from food. B. Cars convert the chemical energy of gasoline into kinetic energy.

C. Some machines can work without consuming energy

4. Energy is ( ).

A. Visible and tangible B. Invisible and intangible

C. Sometimes visible, sometimes invisible

5. Our life ( ) energy.

A. No need B. Can’t live without C. Can leave

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For more information about the "Energy, Electricity and Energy" PPT courseware, please click on the Energy PPT Electricity and Energy PPT tab.

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