A student observes a garden plot. Several plants shaded by a tree are not as large as those of the same species growing in the full sun. The student asks, “Why are the plants growing in the shade smaller than the plants growing in the sun?” Which is the most reasonable hypothesis to explain the student’s observations?

The tree blocks sunlight, lowering the light level in the shaded area. This limits the growth of this plant species, which grows best in direct sunlight.

The tree removes water from the soil. The drier soil limits the growth of those plants growing near the tree.

The tree removes minerals from the soil. The mineral-reduced soil limits the growth of those plants growing near the tree.

Which of the following will allow measurement of a liquid’s volume with the greatest precision?

100 mL cylinder graduated in 0.5 mL increments

50 mL cylinder graduated in 1 mL increments

100 mL cylinder graduated in 1 mL increments

200 mL cylinder graduated in 5 mL increments

A student performed an analysis of a sample for its calcium content and got the following results: 14.92% 14.91% 14.88% 14.91% The actual amount of calcium in the sample is 14.90%. What conclusions can you draw about the accuracy and precision of these results?

These results are both accurate and precise.

While precise, these results are not accurate.

While accurate, these results are not accurate.

These results are neither accurate nor precise.

Which tool below is most precise? Trial Volume Shown by Graduated Cylinder Volume Shown by the Buret 1 25 mL 26.54 mL 2 25 mL 26.51 mL 3 25 mL 26.60 mL 4 25 mL 26.49 mL 5 25 mL 26.57 mL Average 25 mL 26.54 mL

Buret because it has the smallest increments.

Graduated Cylinder because it is closest to the actual answer

Graduated Cylinder because it rounds to a whole number

Buret because it is closest to the actual answer.

In the pendulum lab, it was important that we began by....

Checking precision of testing instruments

0.2 B2, B3: Accuracy, Precision, And Units

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| By UICcorescience

UICcorescience

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1/12 Questions

The chart shows the density of seawater samples collected from the Gulf of Mexico by four different groups. Which group’s data are most precise?
- Group 1
- Group 2
- Group 3
- Group 4

About This Quiz

Explore the concepts of accuracy, precision, and measurement units in this quiz. Topics include volume measurement, density precision, and analysis of data accuracy. Ideal for students enhancing their scientific measurement skills.

0.2 B2, B3: Accuracy, Precision, And Units - Quiz

2.

A student observes a garden plot. Several plants shaded by a tree are not as large as those of the same species growing in the full sun. The student asks, “Why are the plants growing in the shade smaller than the plants growing in the sun?” Which is the most reasonable hypothesis to explain the student’s observations?
- The tree removes water from the soil. The drier soil limits the growth of those plants growing near the tree.
- The tree removes minerals from the soil. The mineral-reduced soil limits the growth of those plants growing near the tree.
- The tree blocks sunlight, lowering the light level in the shaded area. This limits the growth of this plant species, which grows best in direct sunlight.
- Answer option 4
Correct Answer

A. The tree blocks sunlight, lowering the light level in the shaded area. This limits the growth of this plant species, which grows best in direct sunlight.

Explanation

The most reasonable hypothesis to explain the student's observations is that the tree blocks sunlight, lowering the light level in the shaded area. This limitation of light in the shaded area inhibits the growth of the plant species, which typically thrives in direct sunlight.

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1
3.

Which of the following will allow measurement of a liquid’s volume with the greatest precision?
- 50 mL cylinder graduated in 1 mL increments
- 100 mL cylinder graduated in 0.5 mL increments
- 100 mL cylinder graduated in 1 mL increments
- 200 mL cylinder graduated in 5 mL increments
Correct Answer

A. 100 mL cylinder graduated in 0.5 mL increments

Explanation

Precision = small increments

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1
4.

A student performed an analysis of a sample for its calcium content and got the following results: 14.92% 14.91% 14.88% 14.91% The actual amount of calcium in the sample is 14.90%. What conclusions can you draw about the accuracy and precision of these results?
- While precise, these results are not accurate.
- While accurate, these results are not accurate.
- These results are both accurate and precise.
- These results are neither accurate nor precise.
Correct Answer

A. These results are both accurate and precise.

Explanation

The given results are both accurate and precise because they are very close to the actual amount of calcium in the sample (14.90%). Accuracy refers to how close a measurement is to the true value, and in this case, the results are within a very small range of the actual value. Precision, on the other hand, refers to how close multiple measurements are to each other, and in this case, the results are all within a small range of each other. Therefore, the results are both accurate and precise.

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5.

A student needs to collect quantitative data about the pendulum lab. Which of the following is NOT considered quantitative data?
- Length of string
- Initial dropping height
- Period of the swing
- Material used to change mass
Correct Answer

A. Material used to change mass

Explanation

Quantitative data refers to numerical information that can be measured or counted. In this case, all the options except "Material used to change mass" involve measurable quantities. The length of the string, initial dropping height, and period of the swing can all be measured using standard units of measurement. However, the material used to change mass is not a numerical value, but rather a qualitative characteristic. It does not provide a measurable quantity and therefore is not considered quantitative data.

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6.

In our pendulum lab our hypotheses could have arisen from....
- Observations
- Prior Knowledge
- Inferences
- All of the above
Correct Answer

A. All of the above

Explanation

All of the above is the correct answer because in a pendulum lab, hypotheses can arise from observations, prior knowledge, and inferences. Observations of the pendulum's motion and behavior can lead to the formulation of hypotheses. Prior knowledge about pendulums and their properties can also contribute to hypotheses. Additionally, inferences made based on the observed data and prior knowledge can generate hypotheses. Therefore, all of these factors can play a role in the development of hypotheses in a pendulum lab.

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7.

Which tool below is most precise? Trial Volume Shown by Graduated Cylinder Volume Shown by the Buret 1 25 mL 26.54 mL 2 25 mL 26.51 mL 3 25 mL 26.60 mL 4 25 mL 26.49 mL 5 25 mL 26.57 mL Average 25 mL 26.54 mL
- Graduated Cylinder because it is closest to the actual answer
- Buret because it has the smallest increments.
- Graduated Cylinder because it rounds to a whole number
- Buret because it is closest to the actual answer.
Correct Answer

A. Buret because it has the smallest increments.
8.

In the pendulum lab, it was important that we began by....
- Making a hypothesis
- Making observations
- Checking precision of testing instruments
- Generating a testable question
Correct Answer

A. Making observations

Explanation

In the pendulum lab, it was important to begin by making observations because this allows us to gather information and data about the pendulum's behavior and characteristics. By carefully observing the pendulum's motion, we can establish a baseline understanding of its behavior before conducting any further experiments or tests. This initial step helps to ensure that our subsequent hypothesis, testable question, and precision of testing instruments are based on accurate and reliable observations.

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9.

To determine the volume of a cube, a student measured one of the sides of the cube several times. If the true length of the side is 10.62cm, give an example of four sets of measurements that would illustrate the following. a. imprecise and inaccurate data
10.

To determine the volume of a cube, a student measured one of the sides of the cube several times. If the true length of the side is 10.62cm, give an example of four sets of measurements that would illustrate the following. b. precise but inaccurate data
11.

To determine the volume of a cube, a student measured one of the sides of the cube several times. If the true length of the side is 10.62cm, give an example of four sets of measurements that would illustrate the following. c. precise and accurate data
12.

Think back to the activity from class: Why is it important that scientists have a "common language" of measurement? Explain in 3-5 sentences, and include at least one example.

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Current Version
Aug 29, 2023

Quiz Edited by
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Aug 24, 2013

Quiz Created by
UICcorescience

0.2 B2, B3: Accuracy, Precision, And Units

The chart shows the density of seawater samples collected from the Gulf of Mexico by four different groups. Which group’s data are most precise?

Quiz Preview

Which of the following will allow measurement of a liquid’s volume with the greatest precision?

A student performed an analysis of a sample for its calcium content and got the following results: 14.92% 14.91% 14.88% 14.91% The actual amount of calcium in the sample is 14.90%. What conclusions can you draw about the accuracy and precision of these results?

A student needs to collect quantitative data about the pendulum lab. Which of the following is NOT considered quantitative data?

In our pendulum lab our hypotheses could have arisen from....

Which tool below is most precise? Trial Volume Shown by Graduated Cylinder Volume Shown by the Buret 1 25 mL 26.54 mL 2 25 mL 26.51 mL 3 25 mL 26.60 mL 4 25 mL 26.49 mL 5 25 mL 26.57 mL Average 25 mL 26.54 mL

In the pendulum lab, it was important that we began by....

To determine the volume of a cube, a student measured one of the sides of the cube several times. If the true length of the side is 10.62cm, give an example of four sets of measurements that would illustrate the following. a. imprecise and inaccurate data

To determine the volume of a cube, a student measured one of the sides of the cube several times. If the true length of the side is 10.62cm, give an example of four sets of measurements that would illustrate the following. b. precise but inaccurate data

To determine the volume of a cube, a student measured one of the sides of the cube several times. If the true length of the side is 10.62cm, give an example of four sets of measurements that would illustrate the following. c. precise and accurate data

Think back to the activity from class: Why is it important that scientists have a "common language" of measurement? Explain in 3-5 sentences, and include at least one example.