Question: 3 girls wanted to see who could throw a ball the farthest. Each girl brought her favorite ball to the park. Ling brought her basketball, Diana brought her football, and Rachael brought her baseball. They made a line on the playground. They all had to throw the ball from that line. Ling took 2 steps up to the line and threw her basketball. Diana stood at the line and threw her football. Rachael got a running start and threw her baseball when she reached the line. Rachael threw her ball the farthest. Describe 2 variables that are not controlled in the contest.
Reference answer: Different girls are throwing the balls. The girls use different launch techniques. Each girl uses a different type of ball.

Student answer: No one had the same ball and threw the ball differently.

Student answer: One variable that should be controlled is the ball, everyone should use the same ball. Another is if you should get a running start.

Student answer: The type of ball they use how they got to the point of where they were supposed to throw the ball.

Student answer: Size of ball because they all should have used the same ball, where to start they should have all stood in the same spot.

Student answer: If they get a running start and if they had the same ball or not.

Student answer: They do not use the same kind of ball and they get different speeds.

Student answer: The same kind of balls. Having a running start.

Student answer: One is they all have different balls. 2 is they have some bigger which makes them go not as far as distance as the smaller ones which go farther.

Student answer: They did not control the size, and they did not control the type of ball they used.

Student answer: The first variable they did not control is the different kind of ball. The second is the speed they went to get to the line.

Student answer: They do not have the same amount of weight. And not have the same ball. And they run and step. They need to run or step.

Student answer: The balls all need to be the same. And they all need to stand and throw.

Student answer: Throwing at the line and using the same ball.

Student answer: How far they throw the balls and the kind of balls that bring are 2 uncontrolled variables.

Student answer: The variable that was not controlled was that they just brought any ball and made a line and threw it.

Student answer: How they start and what ball they use.

Student answer: 2 variables that are not controlled in the contest were the amount of steps and what ball they are going to use.

Student answer: They all brought different balls. They all started at different starting points.

Student answer: One of the variables is the type of ball. And the second one is how many steps they took during the time when they were throwing balls.

Student answer: What kind of ball you use, and how you throw it.

Student answer: One variable they did not control was that Rachael ran. The other one is that the other 2 girls walked.

Student answer: That they get different lines.

Student answer: That their balls are different.

Student answer: Ball flying in air.

Student answer: When they did not throw the ball the same. When they did not do the same starting position.

Student answer: How they all threw balls. They all should do the same position.

Student answer: The balls and how they held the ball.

Student answer: How they ran to the line and threw their balls.

Student answer: Rachael had a running start and Ling took 2 steps Diana stood at the line.

Student answer: Ran, stood, and walked 2 steps. Also the balls they used.

Student answer: Having different balls, and the way they stood at the line.

Student answer: You have to test it out and you start with the ball to see who throws the farthest. The other thing is to not go past the line and not mess up.

Student answer: They have different kind of ball. Some of them run some took 2 steps.

Student answer: Basketball and football.

Student answer: The balls are different.

Student answer: One of them is they did not have the same kind of ball. 2 is they took different amounts of steps to the line.