Repetition vs Replication

Repetition vs. Replication: Key differences in science experiments explained!

Repetition vs Replication WHAT’S THE DIFFERENCE?Repetition occurs when multiple sets of measurements are made during one scientific investigation.Replication occurs when a scientific investigation is reproduced by another personRepetition is multiple trails, when replication is when you redo the entire experiment.WHY SHOULD WE REPEAT EXPERIMENTS MULTIPLE TIMES?To ensure accurate measurements are takenTo prevent errors in your experimentAllow for further observationsAllows you to check another person’s workIf you have several trials worth of data collected you can graph the data and look for trendsWHY SHOULD SCIENTIFIC INVESTIGATIONS BE REPLICABLE?It allows scientists to discover errors and shows results that may have happened in previous trials.It is also better so scientists know that the data is accurate and that the results will be reliable.If an investigation is replicable, someone else can use it. In order for others to achieve the same results scientists also have to be able to collect the same dataPeople are also able to learn about what scientists researched in the past. Being able to replicate experiments that scientists did hundreds of years ago can give people a better understanding of what science was like then. Type either repetition or replication for the definitions below: Replication: when an experiment is copies by a different scientistRepetition: repeating multiple trials of your own experiment for accuracy Type either repetition or replication for each of scenarios listed below: 1. You go to a neighborhood park 5 times and take notes on the birds you see and hear. You write up your notes.Answer: Repetition2. You go to the same neighborhood park with a friend the next day. You give your friend a copy of the notes you took when you went to the park on your own. You and your friend both take notes on the birds you see and hear.Answer: Replication3. Your friend goes by himself to the same neighborhood park the following day. Your friend takes notes on the birds he sees and hears.Answer: Replication4. Dr. Allen has been reading about another scientist’s research in a physics journal. She plans to do these experiments herself and see if she gets the same result.Answer: Repetition5. Mrs. Sullivan goes to Silver River each week for 4 weeks and collects 5 samples of water to test the quality.Answer: Repetition6. An environmental group contacts Julie to get her procedures so that they can check her results.Answer: Replication7. Keanna was mixing a batch of glue and borax solution to make silly putty and discovered a new substance that glows in the dark. She gave Ryan her specific amounts of ingredients and the steps of her procedure. She asked Ryan to try the experiment to see if he gets the same results.Answer: Replication8. Jerry baked chocolate chip cookies that wound up looking like muffins. He asked DeeDee to use the same directions and see if her cookies also look like muffins.Answer: Replication9. Alyssa has taught her pet rat to run a maze. She thinks that the rat will go faster if she puts its favorite treat at the end. She has the rat run the maze ten times with the favorite treat and ten times with a regular food pellet. She uses a stopwatch to measure how long it takes for the rat to get to the reward.Answer: Repetition10. Walter is testing golf balls. He drops three different brands of balls from 40 cm and measures how high they bounce. He drops each ball 10 times.Answer: Repetition11. Jermaine was given a set of 5 metal cubes. He calculated the densities of each to determine the type of metal in each. The densities were really close to each other, so he asked his friend Dustin to do the same experiment and see if he gets the same results.Answer: Replication12. Dr. Jekyll conducted 1 clinical trial on a new blood pressure medication. He gave the new medication to his mother who has high blood pressure and monitored her for changes. Over time he was able to show with data that her blood pressure improved.Answer: Repetition