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WorksheetsLab Design and Scientific Method Refresher
Total questions: 27
Worksheet time: 11mins
A testable question should include what two things?
A hypothesis and question
A question and a dependent variable
An independent variable but no dependent variable
An independent variable and a dependent variable
Possible explanation for an observation that can be tested.
Hypothesis
Scientific Law
Scientific theory
Critical Thinking
Choose the correct hypothesis for "How will exercising affect your health?"
IF you have better health, THEN you will exercise.
IF you exercise, THEN you will have better health.
Exercising means you're healthy.
A student was doing an experiment using the scientific method. Every three days the student plans to count the green leaves. Which would be a good hypothesis for this experiment?
If plants are placed in direct sunlight, then they will grow more green leaves.
If plants are places in bright light, then they will grow more green leaves than in dim light.
If plants are place in clay pots, then they will grow more green leaves than plastic pots.
If plants are in warmer temperatures, then they will grow more green leaves.
Which of the following is NOT a rule when writing a hypothesis?
It is testable
It is an if/then statement
it should restate the question
It is a prediction.
What is an independent variable?
What a scientist changes in an experiment to test their hypothesis
What scientist measure to see if it responded to a change
What happens when you do an experiment
What you keep the same throughout all experimental groups
How many independent variables should you have in an experiment?
two
as many as possible
four
one
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, the independent variable is ...
type of plant
the amount of sunlight
the type of music
the type of liquid
What is an dependent variable?
What a scientist changes in an experiment to test their hypothesis
What scientist measure to see if it responded to a change
What happens when you do an experiment
What you keep the same throughout all experimental groups
An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the
type of soda given to each group
amount of soda given to each group
pulse rate of each group
age of participants in each group
All the things the scientist keeps the same in their experiment.
Control variables
Dependent variable
Data
Hypothesis
What is a constant/control in an experiment?
Things that do not change in a experiment. It's the variable that stays the same. You can have many variables stay the same.
It's the variables that the scientist changes in the experiment
It's the variables that are being measured in an experiment
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 are the controlled variables?
type of plant, amount of music, and sunlight
plant growth
water, apple juice, milk
This part of the experiment serves as a basis of comparison:
control group
Independent variable
dependent variable
Thomas tests different types of liquids to see which will grow his plants the most. He has water, soda, milk, and no liquid at all. What is the control group?
the one with water
the one with soda
the one with milk
the one with no liquid
Using the picture, identify the control group.
Trial 1
Trial 2
Trial 3
What is the group in an experiment that receives treatment with the independent variable?
control group
experimental group
A step-by-step list of how to carry out an experiment
Guidelines
Directions
Instructions
Procedure
Why is it important that lab procedures are clear and detailed?
So that the lab can be repeated by different experimenters and get the same results.
So that your little brother or sister can have fun with science.
So that experimenters don't have to ask any questions.
So that the experiment can lead to a new scientific theory or law.
Observations made during an experiment are called:
data
problems
conclusions
questions
In order to be accepted, a scientific theory must be
based on the results of a single experiment
widely tested and supported by extensive data
in line with all previous historical ideas
controversial and cause debate
Conclusions based on an experiment are most likely to be accepted when
they are consistent with experimental data and observations
they are derived from investigations having many experimental variables
scientists agree that only one hypothesis has been tested
hypotheses are based on one experimental design
How do scientists prove their claim?
With a story
With evidence
With an experiment
With an essay
