Y2_T2_LSN2.1

• Science
• Middelbare school
• havo, vwo
• Leerjaar 2

TOPIC 2

ENERGY IN THE WORLD

Which types of energy do you know?

TOPIC 2.1

ENERGY SOURCES

P. 52-59

§2.1 - Learning Goals:

P. 52-59

I can:

• give examples of energy sources
• identify different forms of energy
• identify the type of energy conversion takes place
• explain the difference between renewable an non-renewable energy and identify which one applies
• explain the difference between non-sustainable and sustainable energy sources and identify which one applies

§2.1 - Key Words:

P. 52-59

• Law of conversion of energy
• Renewable
• Non-renewable
• Sustainable
• Non-sustainable

§2.1 - Energy sources:

§2.1 - Descriptions:

Discuss definitions of:

• Elektromagnetic (light,...)
• Nuclear
• Thermal
• Kinetic (movement)
• Sonic (sound)
• Chemical
• Electrical

Kinetic energy

Thermal energy

Chemical energy

Electric energy

Nuclear energy

Sonic energy

Electro magnetic energy

Energy that results from movement of an object

Energy resulting from a temperature difference between two systems

Energy resulting from reactions between atoms and / or molecules

Energy resulting from the flow of electrons

Energy resulting from changes in the atomic nuclei or from nuclear reactions

Energy in the form of sound waves

Energy that travels in waves at the speed of light

§2.1 - Law of conservation of energy:

• Energy is not created or destroyed

• Energy can be transformed from one form to another

What do we mean when we say:

 energy is “lost” ?

Energy is never destroyed, but some energy conversion is not useful for us

Example: Your macbook heating up, instead of converting the electrical energy to only light and sound → we “lose” energy in the form of heat

01:23

Will the ball hit the man's face?

Yes

No

What type of energy conversion fits best at the shown power plant?

1. kinetic energy to electric energy to thermal energy
2. Chemical energy to electric energy
3. kinetic energy to nuclear energy to electric energy
4. Thermal energy to kinetic energy to electric energy

§2.1 - Energy conversion at a fossil-fired power plant:

• Chemical energy ⇒ thermal energy(heat)

           By burning coal or gas

• Thermal energy(heat) ⇒ kinetic energy

           By heating water produces steam, this is used to rotate the steam turbine

• Kinetic energy ⇒ electrical energy

           This happens in the generator, similar to what happens in a dynamo

Chemical energy

Electrical energy

Kinetic Energy

Thermal Energy

Write down as many energy sources as you can.

§2.1 - Energy sources:

• Renewable: It does not run out, it renews itself

• Non-renewable: It runs out, so we won’t be able to use it forever

Renewable

Non-Renewable

Solar energy

Natural Gas

Nuclear energy

Coal

oil

Wind

Geothermal

Biomass

§2.1 - Sustainable:

An energy source is that is both renewable and does not harm the environment is called sustainable.

Homework for next time:

Lablesson:

• Prepare Heat of combustion of popcorn
• Prepare Identifying substances by their combustibility 

Theory lesson:

• Complete the exercise of Topic 2.1 (p.54-59)
• Read Topic 2.2 (p. 60-63)
• Study the glossary of Topic 2.2 on Studygo.
• LABJOURNAL: prepare for the experiments: