YR2_T2_LSN1

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

Get ready

• Your Macbook (join the LessonUp)
• Your notebook.
• Your textbook.
• Pen & highlighter

What feeling do you get while looking at this picture?

What feeling do you get while looking at this picture?

What feeling do you get while looking at this picture?

What feeling do you get while looking at this picture?

What do you think all these pictures have in common?

YR2_T2_LSN1

Topic 2.1 Energy sources 

Plan for today

• Theory T2.1 energy sources
  
• Time for homework

Learning goals

I can:

• Give examples of different energy sources
• Identify different forms of energy
• Identify the type of energy conversion that takes place
• Explain the difference between renewable and non-renewable energy and identify which one applies
• Explain the difference between sustainable and non sustainable energy sources and identify which one applies

Key words

• Energy
• Law of conservation of energy
• Renewable 
• Non-renewable
• Sustainable 
• Non-sustainable

Energy

Most common forms of energy:

Law of conservation of energy

Energy is not created or destroyed

Energy can be transformed from one form 

to another

What is “lost” energy?

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

Electrical energy

Electrical energy is “produced” in a power station by converting energy

• Chemical energy ⇒ thermal energy(heat)

by burning coal or gas

• Thermal energy(heat) ⇒ kinetic energy

Heating water produces steam, the steam is used 

to rotate the steam turbine

• Kinetic energy ⇒ electrical energy

This happens in the generator, similar 

to what happens in a dynamo

Energy sources

Renewable = renews itself

non-renewable =  runs out, wont be able to use it forever

Homework 

•  Prepare lab journal for ''Heat of combustion of popcorn''

• Make exercises 1-11 of topic 2.1 in your workbook