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WorksheetsQuiz 003: Experimental Design
Total questions: 20
Worksheet time: 27mins
What is a controlled experiment?
An experiment that includes the use of a control group
An experiment that does not include any variables
An experiment that only tests one variable
An experiment that is conducted without any control
Which of the following is true about the control group?
It is exposed to all the same conditions as the experimental group except the independent variable
It is exposed to different conditions than the experimental group
It is the group that receives the experimental treatment
It is the group that is not used for comparison
What are constants in an experiment?
Quantities/variables a researcher changes during an experiment
Quantities/variables a researcher holds steady during an experiment
Quantities/variables that are not recorded in an experiment
Quantities/variables that are only used in control groups
Which groups are exposed to the same constants in an experiment?
Only the experimental group
Only the control group
Both the experimental and control groups
Neither the experimental nor the control groups
What is one characteristic of a "good" experiment?
Tests multiple variables at a time
Tests one variable at a time
Tests no variables
Tests random variables
Why must a "good" experiment be fair and unbiased?
To allow the experimenter to influence the results
To ensure the experimenter’s opinions affect the outcome
To prevent the experimenter’s opinions from influencing the experiment
To make the experiment more complex
What does it mean for an experiment to be repeatable?
The experiment can be repeated with the same or similar results
The experiment cannot be repeated
The experiment must be different each time
The experiment results must vary each time
What is the validity of an experiment a measure of?
How interesting the results are
How "correct" or trustworthy the results are
How quickly the experiment was conducted
How many people conducted the experiment
Which of the following can improve the validity of an experiment?
Decreasing the amount of constants
Having a small sample size
Adding a control group
Conducting the experiment only once
What is one way to improve the validity of an experiment?
Increasing the amount of constants
Reducing the number of trials
Using a smaller sample size
Ignoring the control group
What is a scientific theory?
A guess based on limited information
A well-tested hypothesis supported by many experiments/data
An untested idea
A random thought
What can a scientific theory explain?
How to conduct an experiment
Why different events occur in the natural world
The exact future events
Personal opinions
What makes scientific theories reliable?
They are based on repeated observations and investigations
They are based on a single experiment
They are based on personal beliefs
They are based on assumptions
What is a scientific law?
A description of observable phenomena in the natural world
An explanation of why observations/events occur
A hypothesis about natural events
A theory about the universe
Which of the following is true about scientific laws?
They are always accepted to be true and universal
They are often disproven
They explain why events occur
They are based on opinions
What happens to a scientific theory if new evidence is uncovered?
It remains unchanged.
It may be revised or replaced.
It becomes a scientific law.
It is accepted as absolute truth.
What is the relationship between scientific theories and scientific laws?
Scientific theories eventually become scientific laws.
Scientific laws are revised to become scientific theories.
Scientific theories do not become scientific laws.
Scientific laws are accepted as absolute truth.
A study was done to find if different tire treads affect the braking distance of a car.
tire treads
Independent Variable
breaking distance
Dependent Variable
the type of car
Constant
The higher the temperature of the air in the oven, the faster a cake will bake.
temp of oven
Idenpendant Variable
time to cook
Dependant Variable
type of cake
Constant
Lemon trees receiving the most water produced the most lemons.
amount of water
Independent variable
number of lemons
Dependent Variable
Type of tree
Constant
