

Fertilizer
Presentation
•
Science
•
10th Grade
•
Hard
Joseph Anderson
FREE Resource
6 Slides • 6 Questions
1
Reviewing Controls & Control Groups

2
Controls or Controlled Variables (Constants)
Stays the SAME in an experiment
For example: same soil, same amount of water, same amount of light are constants when given to all test subjects
3
Multiple Choice
A group of plants receives the same amounts of sunlight BUT different amount of water at the different times each day. What is the constant or controls?
water
amount of sunlight
times of the day
4
Experimental Group
Receives treatment or test material For example: One plant receives fertilizer Fertilizer is the test material, so this plant is the experimental group.
5
Multiple Choice
Jim loves tomatoes & beans. He believed that fertilizer will make the plants grow faster, so he treated one plant with fertilizer and the other plant did not receive fertilizer. They both received the same amounts of water & sunlight. Which one is the experimental group?
plant receiving fertilizer
plant not receiving fertilizer
tomatoes
both plants
6
Control Group
Does not receive the treatment or test material For example: One plant does not receive fertilizer & the other does. Not receiving the fertilizer makes this plant the control group because it gets no treatment or it not manipulated.
7
Multiple Choice
Michael loves lettuce & lima beans. He believes that fertilizer will make the plant grow faster, so he treated one plant with fertilizer and the other plant did not receive fertilizer. They both received the same amounts of water & sunlight? What is the control group?
plant receiving fertilizer
plant not receiving fertilizer
lima beans
both plants
8
Multiple Choice
Michael loves lettuce & lima beans. He believes that fertilizer will make the plant grow faster, so he treated one plant with fertilizer and the other plant did not receive fertilizer. They both received the same amounts of water & sunlight? What is the controls or controlled variables?
fertilizer
water & sunlight
water only
lima beans
9
Open Ended
Explain what controls/controlled variables are in your own words.
10
Answer
Factors that remain “constant”
throughout an experiment
All test groups have same conditions
except for independent variable
Ex. same amount of water, soil type, pots
sunlight, etc. Except the independent variable.
11
Open Ended
Explain the difference between control group & experimental group in your own words.
12
Answer
Control Group: Test group that does not receive the independent variable or treatment It is the normal result you are
comparing your other test results to.
Experimental Group: Receives treatment or Independent Variable
Reviewing Controls & Control Groups

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