Replication versus Repetition

Dr. Lipnick 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. This is an example of (a)   .

• replication

• repetition

Mrs. Sullivan goes to Silver River each week for 4 weeks and collects 5 samples of water to test the pH. This is an example of (a)   .

• replication

• repetition

An environmental group contacts Julie to get her procedures so that they can check her results. This is an example of (a)   .

• replication

• repetition

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.

• replication
• repetition

Tags

NGSS.MS-PS1-2

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

• replication
• repetition

Albert has taught his pet rat to run a maze. He thinks that the rat will go faster if he puts its favorite treat at the end. He has the rat run the maze ten times with the favorite treat and ten times with a regular food pellet. He uses a stopwatch to measure how long it takes for the rat to get to the reward.

• replication
• repetition

Tags

NGSS.MS-ETS1-3

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. This is an example of (a)   .

• replication

• repetition

Jerry 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 Destin to do the same experiment and see if he gets the same results.

• replication
• repetition

We dropped a ball from the same height five times and recorded how high it bounced each time. Repeating the drops showed us that the bounces were almost the same, proving our results were trustworthy.

• replication

• repetition

Lila was testing the effect of different types of water on plant growth. She used tap water, rainwater, and distilled water to grow bean plants and measured their height after two weeks. She recorded her findings and noticed that rainwater led to the tallest plants. To verify her results, she shared her exact measurements of water, soil type, and procedure with her classmate Sam. She asked Sam to conduct the same experiment to see if he gets the same results.

• replication

• repetition

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1