Lesson 11 — 7.4 + 7.5

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

Period 3

Magnetism

This lesson

• Checking the homework
  
•  7.4 Independent variables and dependent variables
• working independently

Learning goals

•  Explain what is meant by independent and dependent variables
• Start studying for the test week

Checking the homework

7.3 — Exercise 1

• a. False – they have a different shape
  
• b. False – aluminium is not magnetic
  
• c. True
  
• d. True
  
• e. False — it will pick up more paper clips
  
• f. False — Electromagnets are stronger
  

7.3 — Exercise 2

a. —

b. The compass needles would turn the other way because the magnetic field gets reversed.

7.3 — Exercise 3

a. Use the battery as a power source, make a coil out of the copper wire and place the iron name in the center of the coil as it's core

Electro magnet schematic

7.3 — Exercise 3

b. No, because both steel and iron are magnetic

Independent and dependent variables

Independent & dependent variables

step 1 — Working independently for 5 minutes

•  Read 7.4
• Write down your own explanation of dependent and independent variables

step 2 — Working together

•  Compare your answers to your neighbours

Independent variables

• This variables is controlled

•  This variable you make changes to

• Cause
  

• Controlled
  

Dependent variables 

• This variable is measured

• This variable reacts to the changes you make

• Effect
  

• Reacts
  

Working independently

The learning material for the test week:

7.1 — 7.4

Learning goals

•  Explain what is meant by independent and dependent variables
• Start studying for the test week