Repetition and Replication

Scientists frequently repeat the experiments of others scientists. Why is this important in science?

• Scientists often ask each other for help in performing experiments.
• Replication of experiments helps to confirm and verify results.
• Scientists frequently perform other scientists’ experiments in order to practice their technique.
• Repeating experiments is an effective way to make sure a laboratory is in optimal condition.

Dr. Smith has been reading about another scientist’s research in a physics journal. He plans to do these experiments himself and see if he gets the same result.

• repetition
• replication

Josue goes to Silver River each week for 4 weeks and collects 5 samples of water to test the pH.

• repetition
• replication

Tags

NGSS.HS-ESS2-5

An environmental group contacts Nina to get her procedures so that they can check her results.

• repetition
• replication

Tags

NGSS.MS-ESS3-3

Kevin was mixing a batch of glue and borax solution to make silly putty and discovered a new substance that glows in the dark. He gave Ja'nay his specific amounts of ingredients and the steps of his procedure. He asked Ja'nay to try the experiment to see if she gets the same results.

• repetition
• replication

Tags

NGSS.MS-PS1-2

Haylena baked chocolate chip cookies that wound up looking like muffins. She asked Lunelka to use the same directions and see if her cookies also look like muffins.

• repetition
• replication

Ms. Spiers has taught Mini Bear to run a maze. She thinks that the hamster will go faster if she puts its favorite treat at the end. She has the hamster 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 hamster to get to the reward.

• repetition
• replication

Tags

NGSS.MS-LS1-5

Ryan 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.

• repetition
• replication

Anthony 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 Robert to do the same experiment and see if he gets the same results.

• repetition
• replication

Tags

NGSS.MS-PS1-2

When a another scientist does someone's experiment to see if the results are valid?

• repetition
• replication
• experimental method
• controlled variable

Tags

NGSS.MS-PS2-5