What is energy?
Characteristics of energy
Conservation of energy
Types of energy I
Types of energy II
100
Do you have energy?
Yes, I do.
100
How is energy stored?
Energy is stored in batteries.
100
Can you create or destroy energy?
No, I can't. Energy cannot be created or destroyed.
100
What type of energy does the electric current have?
Electrical energy.
100
What type of energy does a body at a high temperature have?
Thermal energy
200
Does the air have energy?
Yes, it does.
200
How is energy transported?
Energy is transported through electrical wires.
200
Why does your computer get hot after it has been on for a while?
Because part of the electrical energy is used to make the computer works but another part is transformed into heat.
200
What type of energy does the light have?
Electromagnetic energy.
200
What type of energy does a runner have?
Kinetic energy.
300
Does the sound have energy?
Yes, it does.
300
Can energy be transformed? Give an example.
Yes, it can. For example, electrical energy is transformed into thermal energy in a heater.
300
Why do we say that energy degrades?
Because when we transform one type of energy into another, part of energy is lost as heat.
300
What is the name of the process which takes place in nuclear power plants?
Nuclear fission.
300
What type of energy does food have?
Chemical energy?
400
What is the unit of energy in the International System?
The unit of energy in the International System is the joule (J).
400
Can energy be transferred? Give an example.
Yes, it can. For example, when we kick a ball, we are transferring our energy to the ball.
400
Are you creating energy when you produce heat with your hands?
No, I'm transforming the energy of my body into heat.
400
What is nuclear fusion?
Nuclear fusion is a process in which small nuclei fuse to form a bigger nucleus. This process releases nuclear energy.
400
What is the main disadvantage of nuclear power plants?
They produce radioactive wastes.
500
What is energy?
It's the ability of objects to produce changes in themselves or in other objects.
500
Which are the characteristics of energy?
Energy can be stored, transformed, transported and transferred.
500
Give an example of the degradation of energy.
Example: When we switch a torch on part of the energy of the battery is transformed into light but another part is lost as heat.
500
Wha is chemical energy?
It is energy stored in the bonds that exist between atoms.
500
What is thermal energy?
It's energy produced by the movement of particles which form matter.
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