Fit to 3. A group of students wants to study the effects of temperature on bacterial growth. To get bacteria, they leave petri dishes of nutrient agar open on a shelf. They then put the dishes in different places: an incubator (37 degrees C) a lab room (21 degrees C), a refrigerator (10 degrees C) and a freezer (0 degrees C). Bacterial growth is measured by estimating the percentage of each dish covered by the bacteria at the end of a three day growth period. a) What is the independent variable? b) What is the dependent variable? c) List two (or more) ways to improve this experimental design.
Fit to 3. A group of students wants to study the effects of temperature on bacterial growth. To get bacteria, they leave petri dishes of nutrient agar open on a shelf. They then put the dishes in different places: an incubator (37 degrees C) a lab room (21 degrees C), a refrigerator (10 degrees C) and a freezer (0 degrees C). Bacterial growth is measured by estimating the percentage of each dish covered by the bacteria at the end of a three day growth period. a) What is the independent variable? b) What is the dependent variable? c) List two (or more) ways to improve this experimental design.
Chapter11: The Great Communicator
Section: Chapter Questions
Problem 14MC
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Transcribed Image Text:Fit to
3. A group of students wants to study the effects of temperature on bacterial growth. To get bacteria, they
leave petri dishes of nutrient agar open on a shelf. They then put the dishes in different places: an
incubator (37 degrees C) a lab room (21 degrees C), a refrigerator (10 degrees C) and a freezer (0 degrees
C). Bacterial growth is measured by estimating the percentage of each dish covered by the bacteria at the
end of a three day growth period.
a) What is the independent variable?
b) What is the dependent variable?
c) List two (or more) ways to improve this experimental design.
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