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- 1. Multiple Choice
A scientist tracked the summer eating habits of brown bears. His results are shown in the graph below.
If the brown bears’ reliance on leaves increased by 14 percent, how would the combined total of all the percentages be affected?
It would increase by 14 percent.
It would decrease to 86 percent.
It would remain at 100 percent.
It would change to 114 percent.
- 2. Multiple Choice
Francis was recording plant heights for an experiment. Each time that she took a measurement, she wrote it down. Then, she measured the plant again and compared the new measurement to the one that she had recorded in her notebook. What was she most likely trying to do?
revise her hypothesis
check her memory
make the data more valid
form a conclusion
check her memory
make the data more valid
form a conclusion
- 3. Multiple Choice
For a conclusion to be accepted by the scientific community, the data must be accurate, free from error, and
reproducible.
varied.
unique.
surprising.
unique.
surprising.
- 4. Multiple Choice
What is the most important reason to control the conditions of an experiment?
to make the experiment easier to repeat
to reduce the amount of data that must be recorded
because this is necessary for graphing the data
because this is necessary for the data to be valid
- 5. Multiple Choice
What is the best definition of a conclusion?
a written description of events that occurred during an experiment
an act of recognizing and noting an occurrence by using the senses
a possible explanation of a scientific question based on observation
an explanation that uses data to support or reject a hypothesis
- 6. Multiple Choice
A good conclusion restates the hypothesis so that the reader
does not have to return to the beginning of the report.
sees how the scientist applied the results to the hypothesis.
understands how the methods relate to the hypothesis.
.
recognizes that the hypothesis was correct
- 7. Multiple Choice
Anjuli performed an experiment to determine the respiration rate of yeast. She determined this by measuring carbon dioxide (CO2) production over time. Then, she produced the following graph.
Her teacher suggested that she redraw her graph as a line graph. Why should she redraw the graph?
A line graph looks better in a scientific report.
She was measuring a rate of change.
She had graphed the wrong relationship.
Her experiment had many different variables.
- 8. Multiple Choice
Maria wanted to learn more about the birds that visit her backyard. She installed several bird feeders and offered the same variety of bird seed mixes in each feeder in order to attract a mix of bird species. For a month, she observed the bird feeders three times a day for an hour each day and counted the types of birds that visited the feeders. Then, she made a pie chart to compare the numbers of birds of each species that visited the feeders.
What is the most likely reason that she chose a pie chart?
To show the total number of birds that she observed.
To show the number of times that each bird visited the feeders.
To show which bird species were most common.
To show how the bird species changed over time.
- 9. Multiple Choice
A geologist and a biologist performed an experiment together and examined the data. Each scientist formed a different conclusion. Both conclusions were supported by the evidence. How is this possible?
Both conclusions are the same but have different wording.
If more than one conclusion is supported, the hypothesis is invalid.
There can be alternative explanations for the same evidence.
Each conclusion is based on different data.
- 10. Multiple Choice
How can evidence from an experiment be explained in relationship to the hypothesis?
as a prediction
as a question
as an inference
as a conclusion
- 11. Multiple Choice
Why are line graphs useful when interpreting data?
They make trends in the data easier to see.
They are easier to make than data tables.
They take the place of pictures in a report.
They can be used to show additional data.
- 12. Multiple Choice
How does a good experimental conclusion differ from an inference?
A conclusion states whether it supports the hypothesis; an inference is a guess.
A conclusion explains data; an inference predicts what will occur next.
A conclusion provides little information; an inference is more complete.
A conclusion is proven to be correct; an inference is disproved by an experiment.
- 13. Multiple Choice
Francis was recording plant heights for an experiment. Each time that she took a measurement, she wrote it down. Then, she measured the plant again and compared the new measurement to the one that she had recorded in her notebook. What was she most likely trying to do?
revise her hypothesis
check her memory
make the data more valid
form a conclusion
- 14. Multiple ChoiceBased only on the data table, what is MOST LIKELY a source of error?The students did not use the same starting water temperature for each materialThe students used 2 minute time intervals and should have used longer onesThe students only tested 3 different exothermic reactionsThe students measured in degrees Celsius.
- 15. Multiple Choice
Based only on the data table, what is MOST LIKELY a source of error?
The students did not use the same starting water temperature for each trial
The students used 2 minute time intervals and should have used longer ones
The students only performed 1 trial
Their was a measurement error in trial #3
- 16. Multiple Choice
What kind of data helps you understand the reasoning, opinions and motivations of why customers provide positive or negative feedback to your value proposition?
Quantitative data
Qualitative data
- 17. Multiple Choice
The pH scale measures the acidity or the basicity of a solution. Solutions that have a pH below 7 are acids. Solutions that have a low pH are more acidic than solutions that have a higher pH. The graph below shows the pH of four common fruit juices.
A student studying acidity of juices did a taste test and determined that the orange juice was the sweetest juice and the lemon and lime juices were the sourest. Based on this information, and the data shown in the bar graphs, which is the best inference the student could make about acidity?
Juices with more sugar content have a lower pH.
Higher acidity causes juices to taste more sour.
Juice that tastes sour has a lower pH than juice that tastes sweet.
Grapefruit juice tastes more sour than lime juice.
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