Worksheets3.1 & 3.2 Scientific Method Notes Practice
Total questions: 35
Worksheet time: 23mins
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The Scientific Method is
a series of steps used by scientists to solve a problem or answer a question.
a series of steps used to solve problems or answer questions
a series of steps used by scientists to ask questions and create problems
a series of steps used to solve a problem or ask questions and problems
A plan on how you will conduct your experiment
Data
Procedures
theory
Hypothesis
Reorder the following Steps to the Scientific Method
Observations
Question/problem
Hypothesis
Experiment
Analyze data
Information recorded in your experiment which is used to draw a conclusion is called
reliable
data
hypothesis
observation
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In a controlled experiment, how many variables can be changed at a time?
(a)
Match the following terms and words.
Changed by the experimenter
Independent Variable
The response as a result of change
Dependent Variable
Kept the same throughout the experiment
Constant Variable
Any factor that could change the experiment
Variable
Information collected
Data
Hypothesis: If plants are watered more than normal, then growth height will increase. What is the independent variable?
the amount of water
a plant receiving the normal amount of water
Strength
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A written explanation of what you think will happen, an idea that is tested in an experiment, and may be proven to be true.
observation
variable
hypothesis
data
A hypothesis should indicate two things
What you will do
What you want to happen
What you expect to see
Your conclusion
Reorder the following into the correct order a hypothesis should be written
If
independent
then
dependent
because
Which hypothesis is written correctly?
If you get 8hrs of sleep then it will help you do better in class.
If the amount of sleep is changed then it will affect how you do in class.
I think the amount of sleep will affect how you do in class.
Which hypothesis is written correctly?
I think that a good breakfast will help you stay focused longer.
If your breakfast is changed then one will help you stay focused longer.
if you change your breakfast to eggs then it will help you stay focused longer.
A scientist performs an experiment to see if acids have an effect on the health of a particular type of plant. Three sets of plants were treated with acidic solutions of known pH (Lower the pH number means higher acidity) while the control set was treated with a solution of neutral pH 7. Which is the best conclusion for this experiment?
Match the following
Group that is test on
Experimental Group
Group that is Not Tested on
Control Group
This is used to test the experimental group
Independent Variable
This variable you observe for response and measure for data
Dependent Variable
These are kept the same form both the Experimental and Control Group
Constant Variables
Using the picture, identify the control group.
Trial 1
Trial 2
Trial 3
Hypothesis: If plants are watered more than normal, then growth height will increase. What is the control group?
the amount of water
a plant receiving the normal amount of water
Jerry believed that fertilizer will make the plant grow faster, so he treated one plant with fertilizer and the other plant did not receive fertilizer. What is the experimental group?
plant receiving fertilizer
plant not receiving fertilizer
plant receiving water because it needs water to grow
Michael believed that fertilizer will make the plant grow faster, so he treated one plant with fertilizer and the other plant did not receive fertilizer. What is the control group?
plant receiving fertilizer
plant not receiving fertilizer
Michael believing the plant will grow faster
Steve wanted to see if different types of fertilizer influence sunflower growth. What is the control group?
type of fertilizer
sunflower grown without fertilizer
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Suzie wants to know the effect of different colors of light on the growth of plants. She believes that plants can survive best in white light. She buys 5 ferns of the same species, which are all approximately the same age and height. She places one in white light, one in blue light, one in green light, one in red light and one in the closet. All of the ferns are planted in Miracle-Grow and given 20 mL of water once a day for 2 weeks. After the two weeks, Suzie observes the plants and makes measurements. Match the statements to the correct variable and group.
Plant grown with no light in a closet
Control group
color of light
Independent Variable
Amount of water given to the ferns
Constant
Plants grown in different colors of light
Experimental Group
height
Dependent Variable
This experiment was done to find out which mouthwash kills bacteria most effectively. Each paper disk (labeled with letters) was soaked in a different brand of mouthwash. What change would improve the experiment?
Use a smaller plate with less food and moisture
Use bacteria from many habitats, instead of just from the mouth
Use the same size paper disk for each mouthwash
Use only 1 brand of mouthwash for every disk
There is a new vitamin supplement designed to prevent the flu. It was given to two groups. After 10 weeks, neither group reported a case of the flu. What would make this study more valid?
Test only 1 group with 200 mg of the supplement
Test the supplement on both groups for only 5 weeks instead of 10
Test a third group that receives 150 mg of the supplement
Test a third group that does not receive the supplement
Mr. Batchelder wants to know if the the number of games he watches the Cardinals play each season has an effect on the number of games they win. Mr. Batchelder decides to run this experiment over three football seasons. The first season he watches none of the games the Cardinals play. The second season he watches 50% of the games they play. The third season he watches 100% of the games they play. He watches all the games from the same spot on his couch and wears his lucky tie. Match the statements to the correct variable or group.
The number of games Mr. Batchelder watches
Independent Variable
His lucky tie
Constant Variable
The number of games the Cardinals win
Dependent Variable
The season where Mr. Batchelder watches 0 games.
Control Group
The seasons where Mr. Batchelder watches 50% and 100% of the games.
Experimental Group
Rate your understanding of scientific method as a whole.
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2** I get some things but not others
3*** I feel pretty good; I just need more practice
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