Controlled Experiment
Multiple choice
Vocabulary
The Teachers
100
Some poinsettia plants have green leaves that turn red. A garden club decided to study the color change of poinsettia plants. Knowing that poinsettias change color during the short daylight periods of winter, they decided to investigate the effect of different daylight lengths on color change. Design a controlled experiment using three experimental groups that could be used to determine if the number of hours of daylight has an effect on the color change of poinsettias. State one hypothesis the experiment would test.
What is I predict that poinsettia plants that have more daylight will change colors.
100
A science researcher is reviewing another scientist's experiment and conclusion. When would the reviewer most likely consider the experiment invalid?
What is A) if the sample size produced a great deal of data B) if other individuals are able to duplicate the results C) if it contains conclusions not explained by the evidence given D) if the hypothesis was not supported by the data obtained
100
Define inference
What is A conclusion you make from facts or other evidence
100
Where I come from every day to get here.
What is Long Island
200
Some poinsettia plants have green leaves that turn red. A garden club decided to study the color change of poinsettia plants. Knowing that poinsettias change color during the short daylight periods of winter, they decided to investigate the effect of different daylight lengths on color change. Design a controlled experiment using three experimental groups that could be used to determine if the number of hours of daylight has an effect on the color change of poinsettias. Identify the dependent variable in the experiment.
What is color change
200
An investigation was carried out to determine which of three antibacterial soaps is most effective. Four petri dishes labeled A, B, C , and D were set up. The same amount and type of bacteria was added to each dish. Next, 2 mL of a different brand of soap were added to dishes B, C, and D. Then, 2 mL of water were added to dish A, instead of soap. The dishes were incubated at 37°C for 24 hours. At the end of the investigation, the amount of bacteria in each dish was determined. Dish D had the least bacteria. It was concluded that the soap in dish D was the most effective soap to use against bacteria. Which statement best describes the validity of this conclusion?
What is A) sample of bacteria was used in this investigation. B) The conclusion is valid since too small C) The conclusion is valid since the amounts of bacteria were measured at the end of the investigation. D) The conclusion might not be valid since the investigation was carried out only once.
200
Define Independent Variable
What is The variable in an experiment scientists directly change by adjusting it in the experiment
200
My name
What is Mr. Blackford
300
Some poinsettia plants have green leaves that turn red. A garden club decided to study the color change of poinsettia plants. Knowing that poinsettias change color during the short daylight periods of winter, they decided to investigate the effect of different daylight lengths on color change. Design a controlled experiment using three experimental groups that could be used to determine if the number of hours of daylight has an effect on the color change of poinsettias. Identify two factors that must be kept the same in all three groups.
What is temperature and amount of water and soil (other examples are acceptable)
300
A student conducted an experiment to determine if listening to different types of music would affect pulse rate. She thought that pulse rate would change with different types of music. Each person participating in her experiment listened to seven different selections of music for 30 seconds each. The pulse rates were taken after each 30-second interval of music. Based on her experiment, the student concluded that a person's pulse rate changed when listening to different types of music. The component missing from this experiment is a
What is A) prediction B) hypothesis C) control group D) research plan
300
Define experimental group
What is The subjects that complete trials of an experiment with changes to the independent variable
300
Mr. Bartley's birthday is in this month.
What is January
400
Some poinsettia plants have green leaves that turn red. A garden club decided to study the color change of poinsettia plants. Knowing that poinsettias change color during the short daylight periods of winter, they decided to investigate the effect of different daylight lengths on color change. Design a controlled experiment using three experimental groups that could be used to determine if the number of hours of daylight has an effect on the color change of poinsettias. State one way the three experimental groups would differ.
What is exposure to different lengths of daylight
400
Students noticed that some of their classmates have a hard time concentrating during class. They thought it may have some connection with the fact that these students consume energy drinks just before class. An experiment was proposed to find out if there is a connection between energy drinks and the lack of ability to concentrate in class. A properly designed experiment to determine this would include having
What is A) the whole class drink energy drinks and no water at all, for the entire time of the experiment B) the whole class drink water and no energy drinks at all, for the entire time of the experiment C) the students drink both water and an energy drink just before class D) half the students drink water and the other half drink an energy drink just before class
400
Define hypothesis
What is A prediction of how an experiment may potentially turn out
500
Some poinsettia plants have green leaves that turn red. A garden club decided to study the color change of poinsettia plants. Knowing that poinsettias change color during the short daylight periods of winter, they decided to investigate the effect of different daylight lengths on color change. Design a controlled experiment using three experimental groups that could be used to determine if the number of hours of daylight has an effect on the color change of poinsettias. Describe experimental results that would support your hypothesis.
What is The hypothesis would be supported if only the plants exposed to less than 10 hours of daylight change color and those exposed to more hours of daylight do not change color, All of the plants changed color/none of the plants changed color. (as long as answer matches hypothesis it is correct.
500
A student observes that an organism is green. A valid conclusion that can be drawn from this observation is that
What is A) the organism must be a plant B) the organism cannot be single celled C) the organism must be an animal D) not enough information is given to determine whether the organism is a plant or an animal
500
Define Bias
What is The tendency to believe that some things are better than others
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