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WorksheetsUnderstanding Experimental Design Concepts
Total questions: 53
Worksheet time: 1hrs 3mins
Which variable in an experiment is changed by the scientist to test its effect?
Dependent variable
Independent variable
Control variable
Constant
What is the term for the variable that is measured in an experiment?
Independent variable
Dependent variable
Control group
Constant
Which of the following is an example of a constant in an experiment testing how sunlight affects plant growth?
Amount of sunlight
Type of plant
Height of the plant
Number of leaves
What is the purpose of a control group in an experiment?
To change the outcome
To compare results
To measure the dependent variable
To increase the number of variables
A student wants to test if the amount of water affects how fast a plant grows. Which is the independent variable?
The type of plant
The amount of water
The height of the plant
The size of the pot
If you are testing how temperature affects the rate at which ice melts, which variable should you keep constant?
The amount of ice
The temperature
The time measured
The rate of melting
You are conducting an experiment to see if fertilizer affects plant height. What would be a good control group?
Plants with extra fertilizer
Plants with no fertilizer
Plants with less sunlight
Plants with more water
A graph shows the number of seeds sprouted over 7 days for two groups: one with water and one without. What is the dependent variable in this scenario?
Number of seeds sprouted
Number of days
Amount of water
Type of seed
A student wants to know if the color of light affects how tall a plant grows. She uses red, blue, and white lights, and measures the height of the plants after 2 weeks. She keeps the type of plant, amount of water, and soil the same. Which part of her experiment is the independent variable?
The type of plant
The color of light
The amount of water
The height of the plant
You are given a graph that shows the effect of different amounts of fertilizer on plant height. How would you use the graph to determine if fertilizer has a positive effect on plant growth?
Look for a decrease in plant height as fertilizer increases
Look for an increase in plant height as fertilizer increases
Look for no change in plant height
Look for a decrease in the number of plants
Peppa Pig wants to see if wearing golden boots instead of her normal yellow boots will help her jump higher in muddy puddles. She tries each pair of boots on and then jumps into a muddy puddle. Daddy pig measures how high she can jump. Identify
Independent variable
Pair of boots
Dependent variable
Height of jump
Constant
The muddy puddle
Control group
Yellow Boots
Experimental Group
Golden Boots
In an experiment to see which brand of gel pens ink writes the longest, The brand of pens is (a) while how long each brand lasts is the (b) .
Match the following:
Luis is testing how changing the height (potential energy) affects the splat size (kinetic energy) of a paintball.
Independent Variable
Height
Dependent Variable
Splat Size
Constant
Size of paintball
The amount of fertilizer added to soil is the (a) quantity. The change in height of plant is the (b) quantity.
Match the following:
Rahim usually uses lightbulb brand A, but he notices that it produces a lot of thermal energy (gets very hot). He decides to test two new brands of lightbulb to see if they produce less thermal energy.
Independent Variable
Lightbulb brand
Dependent Variable
Thermal energy (temperature)
Constant
Time the bulb is left on
Control group
Brand A
Experimental Groups
Brands B and C
Cookie Monster wants to see if putting his cookies in a cookie jar will keep him from eating so many cookies as opposed to just putting them on a plate like he normally does. He bakes 2 batches of cookies and one batch he puts on a plate and the other he places in a cookie jar. He then measures how many cookies are left in 1 hour. Not surprisingly, both batches are gone in 10 minutes.
Independent variable
Where he places the cookie
Dependent variable
Number of cookies remaining
Constant
Type of cookie
Control group
Cookies on the plate
Experimental Group
Cookies in the jar
In this graph, scientists counted how many seeds were made by a fruit depending on how the flower was pollinated. (Self pollinated, by a bee or by the farmer/manual) What is the MANIPULATED/Independent variable?
The number of seeds
The type of fruit
How the flower was pollinated (self, bee, manual)
In this graph, scientists counted how many seeds were made by a fruit depending on how the flower was pollinated. (Self pollinated, by a bee or by the farmer/manual) What is the RESPONDING/dependent variable?
The number of seeds
The type of fruit
How the flower was pollinated (self, bee, manual)
A seventh grade science class has been working for two months on an intensive plant lab in the garden, experimenting with growing greens under plastic coverings and under cloth coverings to find out which material better protects plant growth in the winter. Cress is a type of edible plant. Their data is shown in this graph.
What is the X axis for this graph?
Length in cm
Weeks
Cress Growth
Plastic/Cloth
What is something you would have to keep constant in this experiment? (select all that apply)
amount of sunlight all plants get
amount of water all plants get
type of plants
Plastic or Cloth covering
What is the Dependent/Responding Variable?
Length in cm
Weeks
Cress Growth
Plastic or Cloth covering
What does the "X" stand for in DRY MIX?
X-Axis
X-tra Special
Xylem
What does the "Y" stand for in DRY MIX?
Yearly
Yes
Y-Axis
What does the "D" stand for in DRY MIX?
Daring
Dependent
Delivering
Damaged
What does the "I" stand for DRY MIX?
International
Inner
Independent
Individual
The Dependent Variable goes on the ___ axis
x
y
The Independent Variable goes on the ___ axis
x
y
What is the dependent variable in this graph?
Number Sold
Day of the week
Profit
Flavor
What is the independent variable in this graph?
Number Sold
Day of the week
Amount of ice cream
Flavor
The C-E-R framework is used for
writing specific and accurate scientific explanations
organizing data from a lab investigation
analyzing patterns in data
creating drawings of scientific concepts
Claim, Evidence, or Reasoning?
It is the data that supports your claim.
Claim
Evidence
Reasoning
Claim, Evidence, or Reasoning?
Explains WHY you think a claim is correct.
Claim
Evidence
Reasoning
Cell X is from a plant cell. It has chloroplasts. Chloroplasts are found only in plants as it allows plants to make its own food.
Which one of these statement is a Reasoning?
Cell X is from a plant cell.
It has chloroplasts.
Chloroplasts are found only in plants as it allows plants to make its own food.
Which statement is strong evidence?
My family has a computer at home.
My son loves Star Wars.
In a recent study, 78% of students like community service.
I believe that the steelers are the best football team in the NFL
Air is matter. We found that the weight of the ball increases by .5lbs each time we pumped more air into it. This shows that air has weight, one of the characteristics of matter.
Which sentence is the claim?
Air is matter.
We found that the weight of the ball increases by .5lbs each time we pumped more air into it.
This shows that air has weight, one of the characteristics of matter.
Air is matter. We found that the weight of the ball increases by .5lbs each time we pumped more air into it. This shows that air has weight, one of the characteristics of matter.
Which sentence is the evidence?
Air is matter.
We found that the weight of the ball increases by .5lbs each time we pumped more air into it.
This shows that air has weight, one of the characteristics of matter.
Air is matter. We found that the weight of the ball increases by .5lbs each time we pumped more air into it. This shows that air has weight, one of the characteristics of matter.
Which sentence is the reasoning?
Air is matter.
We found that the weight of the ball increases by .5lbs each time we pumped more air into it
This shows that air has weight, one of the characteristics of matter.
High school students should be required to wear uniforms.
What is the evidence?
Mass does not affect how quickly an object falls. In our experiment, the blocks had different masses, 20 g., 30 g., 44 g., 123 g and 142 g but the time for all five blocks to fall was about the same. It took between 1.5 and 1.8 seconds for them to fall. Since the blocks had different masses but took about the same time, I know that mass does not affect how quickly something falls.
In our experiment, the blocks had different masses, 20 g., 30 g., 44 g., 123 g and 142 g but the time for all five blocks to fall was about the same. It took between 1.5 and 1.8 seconds for them to fall.
No, mass does not affect how quickly an object falls.
Since the blocks had different masses but took about the same time, I know that mass does not affect how quickly something falls.
Choose the correct hypothesis for "What effect does studying have on your test grade?"
IF I study for hours, THEN my test grade will be better.
IF I have a good test grade, THEN I will study.
Good grades are from studying.
Choose the correctly written hypothesis for "What is the effect of putting Pam Cooking Spray on the bottom of a sled?"
I think the sled will slide faster.
If I put Pam Cooking Spray on the bottom of my sled, then I will win the race."
If I put Pam Cooking Spray on the bottom of my sled, then I will slide faster.
Which hypothesis is correctly written?
I think I will do well on my test today, because I ate a good breakfast.
If I eat a good breakfast, then I will do well on my test today.
If I eat a good breakfast, then I will earn a passing grade on my test today.
If I do well on my test today, I get to out to eat for breakfast.
Which hypothesis is written corrctly?
If kids sleep for 8hrs, then they will do better in class, because they are rested
If kids change the amount of time they sleep then it will affect how they do in class.
I think the amount of sleep will affect how you do in class.
If kids sleep more, then they will do worse in class, because sleep makes you feel better
Which hypothesis is written correctly?
If you study longer then you will do better on the quiz.
If the amount of time you study is changed then studying 2 hours will help you do better on the quiz.
If the amount of time you study is changed then 2 hours will affect your quiz grade.
Which hypothesis is written correctly?
I think that a good breakfast will help you stay focused longer.
If your breakfast is changed then one will help you stay focused longer.
if your breakfast is changed then eggs will help you stay focused longer.
A hypothesis is never wrong.
True
False
