2-6 Experimenting 2.2

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

Different powersources

(blz. 74)

What you need:

- Textbook, writingbook, iPad

- Pen, pencil, geotriangle

- Calculator

Schoolbags in the cuboard

Phones in the phonebag

Bluetooth 

- ON

- VPN off

    Lesson today:

- Lesson goals (5 min)

- Content (10 min)

- ZWork by yourself 

     (10 min)

- Corrections (5 min)

- Study for the  2T (ask questions if needed)

- AConclusion (5 min)

                       Lesson goals:

- Explain how a fuel cell works.

- Explain what osmotic power is.

Fuel cells

• Generates electricity from 

       fuel (hydrogen/alcohol)

• It does not contain any moving parts. It looks like a battery but it it never runs out of charge.
  
• Fuel cell + electromotor = power a car
• Hydrogen + oxygen = steam + electricity

THEREFORE FUEL CELLS ARE ENVIRONMENTALLY FRIENDLY

OSMOTIC POWER (BLUE ENERGY)

• It is created by using the difference in salinity (salt concentration)
• A filter splits up + and - ions in the salt water - thereby creating a potential difference
• Curently it is only done in 

       laboratories
    It is a clean source of energy

A bus that uses hydrogen fuel has only steam coming out of the exhaust pipe.

1. True
2. False

A fuel cell consists of a motor and a dynamo.

1. True
2. False

A fuel cell continues to provide electricity as long as there is a supply of hydrogen and oxygen only.

1. True
2. False

Fuel cells work on hydrogen gas only.

1. True
2. False

Now do  38 up to 40 (p. 74)

WHEN YOU ARE DONE: go to the website 

https://schooltv.nl/video/het-klokhuis-blauwe-energie/

and look at the short film about blue energy. 

RULES:

• Write in your writingbook
  



• Use: Your textbook
• No discussion
  


• In 10 minutes we will discuss the answers
  

Conclusion:

• Fuel cells make electricity from 
  

        hydrogen or alcohol.

• There are no moving particles in a fuel cell.
  
• It works like a battery.
  
• Blue energy is energy generated due to the difference in salinity between salt and fresh water.