Lesson 3 — 2.1 What is energy?

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

Energy

This lesson

• Recap

•  § 2.1
•  Working indepently

Learning goals

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

Recap

Energy 

• Energy is the ability to do work
  

• The unit of energy is Joule (J)
  

Paragraph 2.1

•  Discussing the homework
• Key concepts

 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 — such as oil and coals

Working independently

Homework

•  Do: the workbook exercises 2.1
• Read: 2.2
• Do: textbook 2.2 q exercises

Learning goals

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