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WorksheetsUnit 1- Lesson 2 Review
Total questions: 11
Worksheet time: 22mins
An independent variable is a variable that is
being purposely manipulated.
unchanged.
measured or being observed.
A dependent variable is a variable that is
unchanged.
purposely manipulated.
measured or being observed.
The three kinds of variables needed in an experiment are...
control, dependent, identical
control, dependent, independent
There is/are (a) independent variable(s) in every experiment. (use a number)
_______________________ is an organized plan for gathering, organizing, and communicating data.
data
graph
hypothesis
scientific method
________________ is an educated guess or proposed answer to a question.
Guess
Hypothesis
Law
Theory
A student wants to find out if grass grows better in the sun or in the shade. When he writes his hypothesis, what will be the independent variable?
The amount of sunlight the grass receives
The amount of water given to the plants
The temperature of the room
The size of the grass
Good experiments follow organized procedures and should be repeated many times to prove validity. Which of these phrases describes another characteristic of good scientific experiment?
variable (different) procedures for obtaining data
uncontrolled surroundings
results that can be replicated
small sample size for collecting data
A student poses the question, "How will batting practice affect a player's batting average?
When writing the hypothesis, what will be the dependent variable?
amount of time spent at batting practice
the player's batting average
Type of bat
The weather during practice
When looking at the graph of the experiment, what label represents the DEPENDENT VARIABLE?
time in days (x-axis)
plant height (y-axis)
A student wants to test the effect of fertilizer on plant growth. She will grow one plant without fertilizer as a control. Why should she perform her experiment with the fertilizer on multiple plants, instead of on just one plant?
Using many repeated trials shows that her results are reproducible
She should not use multiple plants; one plant is enough.
Using many repeated trials shows that no one else can reproduce her
Using many repeated trials will enable her to see whether the amount of sunlight has any effect.
