1. 2-LS2-1 Plan and Conduct an investigation
Fair Test?
1. What does he want to test? What must be the ONLY variable that is different?
HSE Julian has been getting a lot of speeding tickets lately. He wants to see if more tickets are given for one color of car.
2. What is a variable that must be the SAME?
A. type of car
How can he plan an investigation to answer his question,
B. driver of car
What color of car gets more tickets? 86
C. road
D. speed
2-LS2-1 Plan and Conduct an investigation

2. 2-LS2-1 Plan and Conduct an investigation
Fair Test?
What color of car gets more tickets?
1. Julian drove all the cars on the same road at the same speed. They were all different colors. 4 cars were Ford Focus and 1 car was a Ford Mustang. Is this
a fair test AND why?
How could you make it a fair test?
2. Valerie drove all the cars on the same road at the same speed. They were all different colors. All the cars were Chevy Camaros. Is this a fair test AND why?
Karina drove all the cars on the same road. She drove the red car 5 mph
faster than the others. They were all different colors. All the cars were Dodge Challengers. Is this a fair test AND why?
How could you make it a fair test?
2-LS2-1 Plan and Conduct an investigation

3. Fair Test? How can I make the perfect chocolate chip cookie?
1. What is a variable that Julian can change to try to make the perfect cookie?
HSE Julian wants to bake the perfect chocolate chip cookie. He is going to change his recipe until he bakes the perfect cookie!
Temperature of oven
Time to bake
Size of the cookie
How can he plan an investigation to answer his question,
How can I make the perfect chocolate chip cookie?
Change amount of ONE ingredient
Why can he ONLY change one variable?
If you changed more than one variable, you wouldn’t know what caused a change in the cookies!
2-LS2-1 Plan and Conduct an investigation

4. 2-LS2-1 Plan and Conduct an investigation
Fair Test?
How can I make the perfect chocolate chip cookie?
1. Julian added 3 eggs instead of 2 eggs. All other ingredients were the same. He baked the cookies at 350 degrees for 10 minutes.
Starting recipe for okay cookies
Julian added just 1 egg instead of 2 eggs.
Other ingredients were the same. He baked the cookies at 350 degrees for 12 minutes.
How could you make it a fair test?
3. Julian added 2 tsp’s of vanilla instead of 1 tsp. He also added 2 cups of sugar instead of 1. He baked the cookies at 350 degrees for 10 minutes.
How could you make it a fair test?
2-LS2-1 Plan and Conduct an investigation

5. 2-LS2-1 Plan and Conduct an investigation
Have a Great Day!
2-LS2-1 Plan and Conduct an investigation