ملخص درس Types of Energy في العلوم باللغة الإنجليزية للصف الرابع (2)

Unit 2 – Module 1 – Lesson 1: Types of Energy

Grade 4

Al Ghaith School C1

Ms. Hala Mohammed

Chemical energy Nuclear energy

Vocabulary، الطاقة الكيميائية، الطاقة النووية، Types of Energy

Thermal energy الطاقة الحرارية

Do you remember kinetic and potential energies from term 1?

Kinetic energy is the energy of motion, while potential energy is stored energy.

Kinetic energy is when something is moving

طاقة حركية لدى الأجسام المتحركة

Potential energy is when something is above ground or stretched

طاقة مختزنة عندما يكون الجسم على ارتفاع أو مـمـتـد

Forms of Energy

Kinetic and potential energies can have different forms. In this lesson we will

briefly discuss these forms but will learn more about them throughout the term.

Kinetic energy

Sound energy الطاقة الصوتية Light energy الطاقة الضوئية Electrical energy الطاقة الكهربائية Thermal energy الطاقة الحرارية

Potential energy

Chemical energy الطاقة الكيميائية Nuclear energy الطاقة النووية

Chemical Energy الطاقة الكيميائية

Recall that everything is made up of very tiny

particles that we can’t see

Particle، Particle Particle

When these tiny particles join, they gain

energy. This energy is called chemical energy, and it is potential energy.

Chemical energy is found in food, batteries and fuel

Nuclear Energy الطاقة النووية

Energy

When the links between the particle itself are

broken, it releases energy

This energy is called

nuclear energy, and it is potential energy

Example: Nuclear reactions in the Sun release nuclear

potential

Electrical Energy الطاقة الكهربائية

When charges move in a circuit it

produces electrical energy

Electrical energy is kinetic energy.

Chemical energy

Light Energy طاقة الضوء

Light is a type of energy that can

move in all directions.

Light is a type of kinetic energy.

Electrical energy، Light energy

Sound Energy طاقة الصوت

Sound is a type of energy that is made when things vibrate

Sound is a type of kinetic energy.

vibrate

When the boy plays the trumpet vibrates, this makes the air around it vibrates too. Sound moves in waves

until it reaches our ears.

Recall that everything is made up of tiny particles. These particles are moving all the time. Because they are moving they have an energy, called thermal energy

This picture shows how hot and cold particles move.

Notice that the arrows next to the hot particles are long. This means that the hot particles are moving fast, so they

have more thermal energy.

Notice how the arrows next to the cold particles are short. This means that the cold particles are moving slowly, so they

have less thermal energy.

Energy Transfer vs Energy Transformation

In energy transfer, energy is moved between objects. Energy does not

change into another form.

transfer

The picture above shows how thermal energy is transferred from the fire to the hand. Thermal energy moved as thermal energy and did not change into another

form

In energy transformation, energy changes from one form to another.

In this example, chemical energy in the battery changes into electrical energy in the torch, which then changes into light

and thermal energy، transformation

Light + thermal energy

Please check the files uploaded on LMS for extra practice

Good Luck!