Lesson 2 — 2.1 What is energy?

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

Energy

This lesson

• Recap
• What is energy?
  
• Examples of energy

Learning goals

• Name the definition of energy.
  
• Name the unit of energy.
  
• Give examples of energy being used and be able to do calculations about energy being used.
  
• Explain what is meant by fuel and name three examples of fuel.

Recap

What is energy?

Energy is the ability to do work

• The unit of energy is: Joule (J)
  

Examples of energy

1)Name what work is being done in each picture 

2) come up with 3 or more examples of energy in everyday life. Think of the classroom, the school, technology, your body, animals, plants.

Name what work is being done in every picture.

Also, come up with three examples of energy being used in everyday life.

Sources of energy

• Can we name some sources of energy?
  

Name what work is being done in every picture.

Also, come up with three examples of energy being used in everyday life.

 1) Give a definition for energy.

•  The ability to do work

2) Name the unit of energy.

• Joule

3) What do we mean by (J) and (kJ)?

•  J - Joule —— kJ - kilo Joule = 1000 joule

4) Where does our body get its energy from

• Out of the food we eat

5) What does our body use its energy for?

•  Moving, thinking, healing, breathing, digesting, etc.

6) What is fuel?

• A source of chemical energy

7) Name three examples of fuel.

•  Gas, Coal, Oil

Homework

• A research assignment — The food energy cycle

Learning goals

• Name the definition of energy.
  
• Name the unit of energy.
  
• Give examples of energy being used and be able to do calculations about energy being used.
  
• Explain what is meant by fuel and name three examples of fuel.