WorksheetsExperimental Design (PS. 1 fghlj) study guide
Total questions: 51
Worksheet time: 28mins
A statement that is the possible explanation or answer to a question. An educated guess for an experiment that is written in an “If….then….” statement.
conclusion
constant
hypothesis
control
If I water the plant more often, then it will grow taller. Which of these is not a constant?
The amount of soil.
The pot size.
The type of plant.
The amount of water.
Which of these would be the proper way to write a hypothesis
I think the water will make the plant grow.
Watering plants will make them grow better.
If I add more water, then the plant will grow taller.
Maybe water will make a plant grow taller.
Which of these is a quantitative assessment?
He is tall
Ha jumps high
He wears 23
He is 6 feet 8 inches tall
Which is a qualitative assessment?
He is 6 feet 8 inches tall.
He weighs 265 lbs.
He is strong.
He wears a size 13 shoe.
One factor that is purposely changed to test a hypothesis.
conclusion
independent variable
dependent variable
control
A summary of the results of a scientific investigation. Here you either accept or deny your original hypothesis.
Conclusion
independent variable
dependent variable
control
The repetition of an experiment.
Conclusion
Constant
Hypothesis
Repeated Trial
Factors that are kept the same throughout the entire experiment.
Conclusion
Constant
Hypothesis
Control
Facts, figures, and other evidence collected during a scientific investigation.
Repeated Trial
Constants
Data
Control
The group in an experiment that does not receive treatment.
Conclusion
Constant
Hypothesis
Control
The measured factor that may change in response to the independent variable.
Conclusion
Independent Variable
Dependent Variable
Control
Information represented by numerical representations.
Quantitative data
Qualitative data
Conclusion
Repeated trials
Information represented by words and descriptions.
Quantitative data
Qualitative data
Conclusion
Repeated trials
If rose plants receive 3 different fertilizers, then they will make more flowers with the fertilizer that contains the highest amount of nitrogen.
Title
Hypothesis
Conclusion
Procedure
Each day all rose plants received 2.0 grams of fertilizer, 100 mL of water and 8 hours of sunlight throughout the entire experiment.
Control
Repeated trials
Dependent Variable
Constants
Plants receiving fertilizer (A) grew 2.5 cm more per week than plants receiving fertilizer (B). The hypothesis was supported.
Title
Conclusion
Hypothesis
Procedure
Mice receiving a high fat diet appeared to have less energy and interacted less than mice receiving a low-fat diet.
Constants
Dependent Variable
Qualitative Data
Quantitative Data
As the ramp angle was increased, the time it took for the car to roll from top to bottom was measured using a stopwatch.
Dependent Variable
Independent Variable
Qualitative Data
Quantitative Data
Those that walked 1 mile had an average heart rate of 85 beats per minute. Those that ran 1 mile had an average heart rate of 125 beats per minute.
Constants
Independent Variable
Qualitative Data
Quantitative Data
Do ice cubes made with hot water solidify quicker in the freezer than ice cubes made with room temperature water?
Constants
Dependent Variable
Problem
Control
A gardener tests different weed killers on her lawn to see which kills the greatest number of dandelions. What is the independent variable?
Amount of dandelions
Weed killers
Gardener
Lawn
Researchers gave patients Tylenol, Advil, and Excedrin to see which medication would relieve headache pain the fastest. The doctors timed how long it took the medication to reduce headache symptoms. What is the dependent variable?
Length of time to reduce headaches
Type of medication
Type of sickness
Researchers
Students wanted to test which type of grocery bag could carry the most groceries: paper, plastic, or fabric. They filled each type of bag with identical cans of soup until each bag broke and then compared them. What is the independent variable?
Soup cans
Weight the bags could carry
When the bag broke
Type of grocery bag
Select what would be an appropriate title for the graph.
How photosynthesis changes temperature.
Does temperature hurt photosynthesis?
The effect of temperature on rate of photosynthesis
What is photosynthesis?
A company is researching how useful a new medicine is to prevent peanut allergies. They select two groups of people to test the new medicine. The control group should receive –
The medicine
No medicine
Other allergic items
Peanuts
What is the best conclusion based on this data table?
An increase in height is an increase in weight.
A trend was not found between height or weight.
An increase in height is a decrease in weight.
A decrease in height is an increase in weight.
A scientist hypothesized that bats could fly in the dark because they had good eyesight. He covered the eyes of three bats and released them. To his surprise, they flew just as well with their eyes closed. From his observations, he could conclude that
Bats would fly better at night if their eyes weren’t covered.
Bats can only find things by smelling them.
Bats use their sense of sight more than hearing.
Bats don’t need their eyes to fly at night.
A student conducted an experiment and found the above results. What question did the student most likely ask to begin this experiment?
Where does beach trash come from?
Which type of trash is the most abundant on the beach?
How does trash affect ocean wildlife?
Which beach in Virginia has the most trash?
A student wishes to test the hypothesis that adding antifreeze to water lowers the freezing point of water. What would be the dependent (responding) variable?
Type of thermometer used to measure the freezing point
Amount of antifreeze added to the water
Temperature at which the water/antifreeze mixture freezes
Amount of water put into a container
A student predicts that more sugar will dissolve in warm water than in cold water. She puts some water in a container, adds sugar, than stirs. The amount of undissolved sugar is then observed. When this students repeats the experiment to verify her prediction, the only thing that should change is the -
amount of water used
temperature of the water
amounts of sugar used
amount of time stirring
A student wanted to test the hypothesis that adding antifreeze to water lowers the freezing point of water. The student found that pure water froze at 0*C, while the water/antifreeze mixtures froze at -20*C. In order to confirm the results, the student should repeat the experiment using -
exactly the same set-up as the first experiment
a different amount of antifreeze
a different amount of water
a container of a different size
This experiment was set up to test the hypothesis that plants grow faster in green light. What is the independent variable in this experiment?
size of pot
color of light
type of plant
amount of water
Ellen noticed that she often sneezes when she visits her friend Robert, who has a cat and a parrot. Ellen wonders if she may have allergies to Robert's pets and decides to conduct a scientific investigation. What should Ellen do next?
Ellen should call her doctor and insist that she needs shots for allergies.
Ellen should visit Sue who has a horse, a dog, a goldfish, and a hamster.
Ellen should tell Robert that she cannot visit him until he gives away his pets.
Ellen should visit a friend who has only cats and one who has only parrots.
Hypothesis: If fertilizer is added to soil, then the plant's growth will increase.
Which of these experimental designs would best test this hypothesis?
The graph shows the relationship between the time of day and the amount of carbon dioxide in a certain pond. Which of these best describes the relationship?
There is more carbon dioxide used up by algae later in the day.
During the morning hours, there is less carbon dioxide released by fish.
During the morning hours, there is less carbon dioxide found in the pond.
There is more carbon dioxide released by animals later in the day.
