Repetition and Replication Made Easy Assessment
Name___________________________________________________________
Directions: Read all of the following scenarios and circle the correct answer.
1. The following statements were taken from the procedures of four different
investigations.
Investigation
Statement
1
Measure the densities of four different
substances.
Calculate the mass of a penny, a nickel, and a
dime using a triple beam balance.
Read about the winning science fair project
and replicate it.
Conduct four trials of counting how many
plants are produced when creating the exact
conditions.
2
3
4
The statement from which investigation is an example of repetition?
A. Investigation 1
B. Investigation 2
C. Investigation 3
D. Investigation 4
2. Keesha did an experiment to study the rate of photosynthesis in the water plant Elodea.
She placed a piece of Elodea in a beaker of water and set the beaker 10 centimeters (cm)
from a light source. Keesha counted the bubbles released from the plant every minute for
five minutes (min). She repeated the process two more times. First, she moved the light to
20 cm from the beaker, and then she moved the light to 30 cm from the beaker. Keesha’s
setup and data are shown below.
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If Keesha’s lab partner wanted to conduct Keesha’s investigation for accuracy what
would this be an example of?
A.
B.
C.
D.
Repetition
Theory
Replication
Laws
3. Read and analyze the following scenarios. Determine which one is an example of
repetition.
1.
Jennifer 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.
2.
Kevin was given a set of 5 cubes. He calculated the densities of each to determine
the type of cube. The densities were really close to each other, he thought about
repeating his investigation but decided he’d asked his friend John to do the same
experiment and see if he gets the same results.
3.
Jenna baked chocolate chip cookies that wound up looking like muffins. She asked
Keesha to use the same directions and see if her cookies also look like muffins.
4.
Mike 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 John his specific
amounts of ingredients and the steps of his procedure. He asked John to try the
experiment to see if he gets the same results.
Which scenario represents repetition?
A. 1
B. 2
C. 3
D. 4
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Answer Key
1. D
2. C
3. A
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