Year 7 Fair Testing

Year 7 Fair Testing

Ms Lockwood

What makes a contest fair?

What makes a contest fair? Think about a time when you or someone you know entered a contest or competition. How was the winner determined? Was the contest fair? If not, what made the contest unfair?

Open Ended

What makes a contest fair?

Role Play! I am going to need 4 volunteers

• Narrator

• Angelina

• Gregory

• Monique

Multiple Choice

Monique agrees that eating lunch before the race might have been a variable that aff ected Gregory’s performance. What else does Gregory think was a variable in the race?

• The other boy got a head start.

• It was raining that day.

• The other student had new sneakers.

• The teachers liked the other student better than Gregory.

Multiple Choice

Why does Gregory want to do more than one trial for the running contest?

• He thinks he could win if he had a second chance.

• He always runs badly his first time.

• He ran in a different contest that allowed him more than one trial .

• He wants to run against people who are slower than him.

Multiple Choice

Why does Angelina finally agree with Gregory that the contest didn’t determine the best runner in the school?

• She knows he is a good runner.

• She is a friend of Gregory’s and wants him to be happy.

• She agrees that controlling other variables will make the contest better.

• Monique says that Gregory is right.

Open Ended

What other variables could affect a race?

Open Ended

Why is it important to do multiple trials in a race?

Open Ended

In what other ways could this race have been

changed in order to make it more fair?

New Concepts

• CONTROLLING variables: making sure the only thing that changes in your test is what you plan on measuring.

• MULTIPLE trials: making sure that you don’t base your thinking on too few events.

• OBJECTIVE measurement: making sure that you measure using a system that others can use in the same way.

Open Ended

Gregory has made some complaints about why he thinks this wasn't a fair test. Think about ways to make the test most fair given his complaints.

First complaint: Gregory raced immediately after eating and Evan raced an hour after eating

Multiple Select

Does your idea involve:

• Controlling variables

• Multiple trials

• Objective measurement

Open Ended

Complaint 2: The decision about who was the best runner was based on only one race.

What is a way to make this more fair?

Multiple Select

Does your idea involve:

• Controlling variables

• Multiple trials

• Objective measurement

Open Ended

Complaint 3: The coach watched the runners and picked out who he thought crossed the finish line first to be the winner.

What is a way to make this more fair?

Multiple Select

Does your idea involve:

• Controlling variables

• Multiple trials

• Objective measurement

In groups of 3

Come up with 3 more ways that a race could be unfair, then a solution to make the race fair for each, and identify whether the solution controls the variables, involves multiple trials, or objective measurement

Multiple Choice

Julio wanted to know which tomato plant grew the fastest. He tested many kinds of seeds, but he also used different types of soil.

Would you say that Julio should pay more attention to:

• controlling variables?

• multiple trials?

• objective measurement?

Open Ended

Tell Julio a better process:

Complete the worksheet handed around

Try and do it independently!