Lesson 2. 2.2 Energy from the Sun

• Natuurkunde / Scheikunde
• Middelbare school
• havo, vwo
• Leerjaar 1

Energy

From the

Sun

This lesson

• Recap
• About the sun
• Paragraph 2.2

Learning goals

• Describe how energy in our food comes from the sun

• Explain why the sun is the source of energy for everything in our solar system

• Name three types of fossil fules

• Name the six types of green energy (Solar, Wind Hydro, Geo-thermal, Bio, Nuclear)

• Describe the difference between solar cells and solar panels  

Learning goals — Recap

•  Give a definition for energy
• Describe where we get our energy from
• Know the unit of energy

Learning goals — Recap

The definition of energy

•  The ability to do work

Where do we get our energy from?

• Out of the food we eat

The unit of Energy

• Joule (J), kilojoules (kJ)

Energy from the Sun

What do you know about the sun?

Paragraph 2.2

1) How does the energy from the sun get into our bodies?
2)How are fossil fuels created?
3) Name three examples of fossil fuel

4) What is a biofuel?

1) How does the energy from the sun get into our bodies?

• Plants use the energy from the sun to grow using  photosynthesis.

• This way energy from the sun gets stored in plants.

•  When animals eat plants they use the energy stored in the plants to grow themselves.

2)How are fossil fuels created?

• Many trees and animals died over millions of years
  

• As the surface of the earth changed they got buried under sediments such as mud, sand and earth.

• This created massive amounts of pressur. Over time they were converted into fossil fuels.

3) Name three types of fossil fuels

•  Coal : formed from plants

•  Gas : fromed from sea creatures

• Oil: fromed from sea creatures 

4. what are biofuels

any fuel that is derived from biomass—that is, plant or algae material or animal waste.

Alcohol and wood are examples of biofuel.

Green energy

What do you know about?

• Why is it important?
  
• How is it different from fossil fuel?
  
• How is it generated?
  

Renewable or green energy

Renewable energy uses energy sources that are not "used up". For example, solar power from the sun is renewable as we can use it  again and again.  Examples of non-renewable energy sources include fossil fuels like coal and oil. 

Most common sources of green energy

• Solar
  
• Wind
  
• Hydro
  
• Geo-thermal
  
• Biomass
  

Solar energy

Solar panels

Solar cells

Wind energy

Wind turbine: Wind makes the wind turbines turn around.

Hydro energy (water)

Hydropower plant

Geo thermal 

 this type of energy is found under the earth. The hot lava from a volcano can be used as a source of heat.

Bio mass

Biomass energy uses natural materials like trees and plants to make electricity.

Nuclear energy 

Nuclear energy is the energy in the nucleus, or core, of an atom.  There is a huge amount of energy in an atom's dense nucleus

Homework

Workbook exercises 2.2

Next lesson — Homework check

2.1

•  Yellow block exercises (textbook)
  
• Workbook exercises (workbook)
  

2.2

•  Yellow block exercises (textbook)
  
• Workbook exercises (workbook)