Mr. S normally uses praise as a reward to train his dog.  He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. What is his independent variable?

• amount of times the dog follows the command
• type of reward
•  praise
• type of dog

Mr. S. normally uses praise as a reward to train his dog.  He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands.  Identify the dependent variable.

• amount of times the dog follows the command
• type of reward
• praise
• type of dog

Mr. S. normally uses praise as a reward to train his dog.  He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands.  What is his control trial?

• type of reward
• trials done with new rewards
• trials done with praise 
• the leash that he uses

Mr. S. normally uses praise as a reward to train his dog.  He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands.  What is his control trial?

• type of reward
• trials done with new rewards
• trials done with praise 
• the leash that he uses

Tags

NGSS.MS-ETS1-1

Mr. S. uses a new spray cleaner to remove green slime left by students on the lab tables.  Identify the dependent variable

• type of cleaner
• the new cleaner
• the old cleaner
• the effect of the cleaners

Mr. S. uses a new spray cleaner to remove the green slime left by students on the tables.  Identify the control trial

• type of cleaner
•  test with a new cleaner
• test with the old cleaner
• the green slime

Mr. S. uses a new spray cleaner to remove the green slime left by students on the tables.  Identify the independent variable.

• type of cleaner
• the new cleaner
• the green slime
• the effect of the cleaner

Mr. S. wants to find the best way to get more students to attend extra help review.  Normally, he does not give extra credit for attending extra help.  On one quiz, he decides to give extra credit to students who attend extra help.  Identify the dependent variable.

• extra points for attending extra help
• extra points for attending extra help
•  number of students attending extra help
• student scores

To control variables means to

• measure properly
• repeat the experiment
• change one thing at a time
• test things out for yourself

 At the salad bar, the grocery store charges $5.99 for each half pound you buy.  Which variable is dependent?

• weight of the salad 
• total cost of the salad
• cost of salad per pound
• $5.99