Your teacher will give you some cards.
Choose one card that shows how to plan a fair test to answer the question: Will a marble roll further on a carpet or a smooth floor?
You will need to think about what has to stay the same, and what will need to change.
- Show your teacher the card you have chosen.
- Tell your teacher why you chose this card, and why you didn't choose the other ones.
Cut into 4 cards.
