WorksheetsBiology Experimental Design and Variables
Total questions: 18
Worksheet time: 35mins
Name
Class
Date
1.
What is the factor that an experimenter changes on purpose?
a)
Dependent Variable
b)
Independent Variable
c)
Constant
d)
Control
2.
What is an if....then statement that predicts the outcome of an experiment?
a)
Conclusion
b)
Materials
c)
Hypothesis
d)
Problem
3.
The part of the experiment that does not contain the independent variable. Used for comparison.
a)
Control Group
b)
Experimental Group
c)
Results
d)
Data
4.
What are all the things that are kept the same in an experiment?
a)
controls
b)
data
c)
constants
d)
independent variables
5.
What is the effect of salt water on the average of the height of the 3 tallest blades of grass?
What is the independent variable in the above question?
What is the independent variable in the above question?
a)
salt water
b)
height
c)
average
d)
effect
6.
What is the effect of salt water on the average of the height of 3 tallest blades of grass?
What is the dependent variable in the above question?
What is the dependent variable in the above question?
a)
the salt water
b)
effect
c)
average of the 3 tallest blades of grass
d)
number of blades of grass
7.
"If the forest is clear-cut (cutting down all the trees in an area of forest), then it will result in drier soils because there will not be any trees to protect the soil from sunlight" is an example of:
a)
a theory
b)
a hypothesis
c)
an experimental question
d)
a conclusion
8.
The number of variables that should be allowed to change in a well designed, controlled experiment is:
a)
none
b)
1
c)
2 or more
d)
dependent on the type of experiment
9.
The __________________ variable is the variable you are observing and that changes in response to the _________________ variable.
a)
independent (experimental), dependent
b)
dependent, independent (experimental)
c)
dependent, control
d)
independent (experimental), control
10.
You read that cats will meow more if they eat more ice cream. You decide to do an experiment to test this hypothesis. Using your cat for the experiment, you feed your cat 50 cm3 of vanilla ice cream, 100 cm3, and no (0 cm3). You made sure that during your experiment, you used the same beaker, same brand of ice cream, the same temperature ice cream, and the same procedure for feeding your cat. Once your cat was finished eating you counted the number of times he meowed in 10 minutes. You recorded your data in a data table.
What is the dependent variable (DV) in this experiment?
What is the dependent variable (DV) in this experiment?
a)
The cat
b)
The amount of ice cream
c)
The number of meows
d)
The type of ice cream
11.
Students put two plants in the sun. Plant A is in the sun for 10 minutes. Plant B is in the sun for 1 hr. Students decide that plant B is better at photosynthesis. This is wrong because...
a)
They didn't control all variables
b)
The independent variable was sunlight
c)
The dependent variable was amount of gas produced
d)
they used different amounts of water
12.
If you were testing how well different dish soap cleaned grease, the independent (experimental) variable would be the:
a)
Dishes
b)
Water
c)
Dish Soap
d)
Types of Grease
13.
Students are growing plants in the dark or in the light to see which grows better. They put 3 seeds in the dark and 5 seeds in the light because they know seeds are more likely to dry out in the light.
How could this experiment be improved?
How could this experiment be improved?
a)
Put all plants in the light.
b)
Put all plants in the dark (where they sprout better)
c)
Put the same number of seeds in each container.
d)
put all the plants in the light so they grow better
14.
Which of the following terms refers to a group that receives no treatment with the independent variable?
a)
Constant group
b)
Control group
c)
Dependent group
d)
Experimental group
15.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what is the dependent variable?
a)
Type of plant
b)
Water, apple juice, milk
c)
Plant growth
d)
Color of the plant's leaves
16.
Research question: does the distance a person kicks a soccer ball effect how well they will do on their math test. What is the dependent variable?
a)
How far they kick the soccer ball
b)
who the person is
c)
how well they do on the math test
d)
Type of soccer ball.
17.
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?
a)
Dependent
b)
Independent
c)
Control
d)
Compound
18.
What would the INDEPENDENT variable be in an experiment testing which types of paper airplane goes furthest?
a)
the paper used
b)
the type of paper airplane
c)
the distance of each plane's flight
d)
how hard the plane is thrown
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