Science Experiment Measurements Quiz

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Questions and Answers

A student is determining the density of a sugar solution. Their experimental result of 1.25 g/cm³ is compared to an expected value of 1.30 g/cm³. Which statement best describes the accuracy of the student's result?

The experimental result is reasonably accurate. (correct)

The experimental result is neither accurate nor precise.

The experimental result is very accurate, but not very precise.

The experimental result is very precise, but not very accurate.

A rectangular block has dimensions of 2.0 cm x 3.5 cm x 5.0 cm. What is the volume of the block, expressed with the correct number of significant figures?

35 cm³ (correct)

35.00 cm³

30 cm³

35.0 cm³

How many of the following measurements contain three significant figures: 102, 0.456, 1.00, 1000, 45.0, 0.002?

Four (correct)

Two

Three

Five

A student measures the length of a metal bar using a ruler. The marks on the ruler are every 0.1 cm. The end of the bar falls between the marks at 12.4 cm and 12.5 cm. Which of the following is the best measure of the length of the metal bar?

12.45 cm Signup and view all the answers

A graduated cylinder contains water. The bottom of the meniscus in the cylinder is exactly between the 48 mL mark and the 49 mL mark. What is the correct reading of the volume, taking significant figures into account?

48.5 mℓ Signup and view all the answers

What is the correct conversion of 25 cm² to m²?

0.0025 m² Signup and view all the answers

When converting 1000 cm³ to m³, what is the resulting volume?

0.001 m³ Signup and view all the answers

Which of the following statements about conversion factors is incorrect?

Conversion factors can only be derived from length measurements. Signup and view all the answers

What happens to the conversion factor when changing from a squared to a cubic unit?

The conversion factor is raised to the power of three. Signup and view all the answers

What is the correct conversion factor for converting 1 meter to centimeters?

100 cm / 1 m Signup and view all the answers

A student needs to convert 16.0 km² to m². Utilizing the correct conversion factor, what should the student do?

Multiply by 1,000,000. Signup and view all the answers

In the conversion factor for liters to cubic centimeters, what is the numerical value of 1 liter?

1000 cm³ Signup and view all the answers

How should the conversion factor be addressed when the unit is raised to a power of n?

It should be raised to the power of n. Signup and view all the answers

While converting units, what is the most critical step to ensure correctness?

Ensure units cancel appropriately. Signup and view all the answers

Study Notes

Question 1

A student performs an experiment to determine the density of a sugar solution.
The obtained results are 1.79 g/mL, 1.71 g/mL, 1.93 g/mL, and 1.72 g/mL.
The actual value for the density of the sugar solution is 1.75 g/mL.
The student's results are precise but not accurate.

Question 2

Calculate the volume in cubic centimeters (cm³) given a volume in cubic millimeters (mm³).
The conversion is 2.83 x 10⁷ mm³ = 28.3 cm³

Question 3

Information on Question 3 is missing.

Question 5

A metal bar is measured using a ruler.
The correct reading is 15.6 cm.

Question 6

The level of liquid in a graduated cylinder is measured.
The correct reading is 13.2 mL.

Question 7

A student performs an experiment to determine the density of a sugar solution.
The obtained results are 1.69 g/mL, 1.66 g/mL, 1.91 g/mL, and 1.72 g/mL.
The actual value for the density is 1.75 g/mL.
The student's results are neither precise nor accurate.

Question 8

A calculation involving multiplication is given.
The result, with the correct number of significant figures, is 1.21 x 10^-7.

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Description

Test your understanding of measurement accuracy and precision in scientific experiments. This quiz covers concepts such as density determination, unit conversion, and measuring liquid levels using graduated cylinders and rulers. Challenge yourself with practical scenarios and evaluate your comprehension of measurement techniques.