Question

repetition and replication
repetition
you repeat your experiment in your own lab.
this is an important step because it shows your experiment is reputable and good.
replication
this is when another scientist does your experiment in their lab.
directions: read each scenario and decide - is this repetition or replication?
scenario\trepetition or replication?\texplain why you chose repetition or replication.

1. dr. bowser was reading about another scientists research in a science journal. he plans to do these experiments himself to see if he gets the same results.
2. mulan goes to the saint johns river every week for 4 weeks and collects 5 samples of water to test the ph.
3. the huns contact mulan to get her procedure so that they can check her results.
4. jordin baked chocolate chip cookies that wound up looking like muffins. she asked jazzy to use the same directions and see if her cookies also looked like muffins.
5. mike taught his pet rat to run a maze. he thinks the rat will go faster if he puts his favorite treat at the finish line. he has the rat run the maze 10 times with his favorite treat at the end and 10 times with regular rat food at the end. he uses a stopwatch to measure how long it takes the rat to get to the end.

Explanation:

1. Dr. Bowser is another scientist doing someone else's experiment, so it's replication.
2. Mulan is repeating her own water - testing experiment, so it's repetition.
3. The Huns are another group doing Mulan's experiment, so it's replication.
4. Jazzy is another person doing Jordin's cookie - baking experiment, so it's replication.
5. Mike is repeating his own rat - maze experiment, so it's repetition.

Answer:

1. Replication; Another scientist is doing the experiment.
2. Repetition; Mulan is repeating her own experiment.
3. Replication; Another group is doing Mulan's experiment.
4. Replication; Another person is doing Jordin's experiment.
5. Repetition; Mike is repeating his own experiment.