Quiz: Scientific Investigation Skills — 12 questions

1. Which distinction is essential when deciding whether a pursuit follows scientific principles?

A. Astronomy studies celestial phenomena, whereas astrology makes claims about personal effects of celestial bodies

B. Astronomy interprets personality traits, whereas astrology measures physical properties of celestial bodies

C. Astronomy and astrology use identical methods but address different historical traditions

D. Astronomy relies on personal predictions, whereas astrology tests measurable celestial processes

Answer: (A)

Explanation

Astronomy investigates celestial phenomena through scientific methods, while astrology links celestial positions to personal or earthly outcomes without the same scientific basis. The second option reverses the defining activities of the two pursuits.

2. How should someone determine whether an activity qualifies as science?

A. Ask whether the activity has been practiced across several generations

B. Check whether the activity produces a numerical result in a laboratory

C. Apply the seven taught terms and definitions to evaluate the activity

D. Determine whether the activity concerns nature rather than human behavior

Answer: (C)

Explanation

The scientific status of an activity is evaluated by applying the seven relevant terms and definitions. Numerical results, subject matter, or historical longevity may occur in non-scientific activities and do not provide the stated test.

3. In an experiment testing how different amounts of fertilizer affect plant height, which variable is the independent variable?

A. The number of leaves counted at the end

B. The amount of fertilizer applied to each plant

C. The type of ruler used to measure the plants

D. The final height measured for each plant

Answer: (B)

Explanation

The independent variable is the experimental input identified when the experiment is set up, so here it is the amount of fertilizer. Plant height is a measured outcome and therefore represents the dependent variable.

4. In an experiment testing how water temperature affects the time required for sugar to dissolve, which variable is the dependent variable?

A. The temperature of the water in each trial

B. The mass of sugar placed in each container

C. The volume of water used in each trial

D. The time required for the sugar to dissolve

Answer: (D)

Explanation

The dependent variable is the outcome measured while interpreting the results, which is the dissolving time in this experiment. Water temperature is the experimental input and therefore serves as the independent variable.

5. What is the appropriate first approach when setting up an experiment for a specific scenario?

A. Change several experimental inputs without distinguishing their effects

B. Record the results before selecting the variables to examine

C. Choose a graph before deciding what the experiment will measure

D. Identify the variables and apply basic principles of science

Answer: (D)

Explanation

An experiment is set up by identifying its variables and applying basic scientific principles to the scenario. Choosing a graph prematurely or changing inputs without distinguishing them prevents clear interpretation of the experiment.

6. What does effective graphing of experimental data require?

A. Placing every measured value in a table without selecting a visual display

B. Choosing a graph based on appearance and describing points without examining relationships

C. Drawing axes first and treating the resulting pattern as the experimental conclusion

D. Selecting a suitable graph, including its required components, and interpreting relationships

Answer: (D)

Explanation

Effective graphing combines an appropriate graph type, required components, and interpretation of relationships shown by the data. A table, visual appearance, or unexamined pattern does not by itself provide the required data interpretation.

7. According to standard graphing conventions, how are the independent and dependent variables assigned to graph axes?

A. The dependent variable is placed on both axes when the experiment has one outcome

B. The independent variable is placed on one axis, and the dependent variable on the other

C. The independent variable is omitted when the data form a clear relationship

D. Both variables are placed on the same axis so their values can be compared

Answer: (B)

Explanation

Graphing conventions require the independent and dependent variables to be represented on separate axes. Placing both variables on one axis or omitting one prevents the graph from displaying their relationship clearly.

8. A measurement is close to the accepted value but varies noticeably between repeated trials; how should it be described?

A. Accurate but not precise

B. Both accurate and precise

C. Neither accurate nor precise

D. Precise but not accurate

Answer: (A)

Explanation

Accuracy describes closeness to the accepted value, whereas precision describes agreement among repeated measurements. The measurements are therefore accurate but not precise because their repeated values vary.

9. Which information is needed to determine the scale of a measuring instrument?

A. Its maximum capacity, material, and calibration date

B. Its major scale, minor scale, and estimated uncertainty

C. Its numerical range, color, and measurement purpose

D. Its smallest label, physical size, and manufacturer

Answer: (B)

Explanation

Reading an instrument’s scale requires identifying the major divisions, minor divisions, and the uncertainty estimated from the scale. Calibration dates and physical features do not determine how the scale should be interpreted.

10. A student measures a length carefully and then changes its value from centimeters to meters; which pair of skills is being demonstrated?

A. Instrument calibration and non-metric conversion

B. Accurate measurement and metric conversion

C. Precision estimation and temperature conversion

D. Scale construction and unit cancellation

Answer: (B)

Explanation

The student is measuring carefully and converting between units within the metric system, which combines accurate measurement with metric conversion. Non-metric conversion and instrument calibration describe different tasks.

11. Which microscope part supports the slide while it is being viewed?

A. The objective lens

B. The eyepiece

C. The diaphragm

D. The stage

Answer: (D)

Explanation

The stage is the platform that supports the slide during observation. The diaphragm controls illumination, the eyepiece is viewed through, and the objective lens magnifies the specimen.

12. What is the appropriate general sequence for focusing a specimen with a compound microscope?

A. Begin with the diaphragm closed, switch objectives, then use coarse focus

B. Begin with high power, use fine focus, then adjust with coarse focus

C. Begin by moving the stage rapidly, then adjust the eyepiece position

D. Begin with low power, use coarse focus, then refine with fine focus

Answer: (D)

Explanation

Focusing generally begins with the low-power objective and coarse adjustment, followed by fine adjustment to sharpen the image. Beginning at high power or using coarse focus after high power can make focusing more difficult and risk contact with the slide.