GED Science Experimental Design and Evidence Quiz

1. In scientific research, what does 'bias' refer to?

Having strong opinions about a topic

Systematic error or prejudice that skews results

Disagreeing with other scientists

Using too many control groups

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4. A study shows that increased screen time correlates with lower academic performance. Which explanation is most scientifically sound?

Screen time directly causes lower grades

Lower grades cause students to use screens more

The relationship may be confounded by sleep deprivation or other factors

The correlation is too weak to consider

5. A clinical trial tests a new drug against a placebo. Which statements are true? (Select all that apply)

The placebo group is the control group

Participants should know which group they are in

The drug group is the experimental group

Results are valid only if all participants respond identically

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6. Which of the following are examples of quantitative data? (Select all that apply)

Temperature measured in degrees Celsius

Color of a solution

Mass of an object in grams

Observations about texture

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7. True or False: An experiment with a p-value of 0.05 proves the hypothesis is definitely correct.

True

False

8. True or False: A hypothesis must be testable and falsifiable.

True

False

Submit

11. In a controlled experiment, what is the purpose of a control group?

To provide a baseline for comparison with experimental groups

To ensure all variables are changed at once

To increase the sample size automatically

To eliminate the need for data analysis

12. A scientist observes that ice melts faster in salt water than in fresh water. What is the next logical step?

Publish the findings immediately

Design a controlled experiment to test this observation

Assume the hypothesis is proven

Discard the observation as an anomaly

13. A sample size of 50 subjects is used to test a medication. Why is this better than a sample of 5?

Larger samples reduce random variation and increase reliability

Larger samples are always cheaper

Larger samples eliminate the need for a control group

Larger samples prove the hypothesis is true

14. Which type of graph best displays the relationship between two continuous variables?

Bar graph

Pie chart

Scatter plot or line graph

Pictograph

15. A study finds that students who eat breakfast score higher on tests. Does this prove breakfast causes better test performance?

Yes, the correlation proves causation

No, correlation does not establish causation; other factors may be involved

Yes, if the sample size is large enough

Only if the control group also ate breakfast

16. What does it mean for data to be reliable?

The results prove the hypothesis is correct

The measurements are consistent and reproducible

The data comes from a single source

The experiment is completed in one day

17. A researcher studies the effect of temperature on enzyme activity. Which factor should be kept constant?

Temperature

Enzyme concentration and pH

The type of substrate

Both b and c

18. Why is it important to replicate an experiment multiple times?

To reduce the cost of materials

To verify results and account for random variation

To make the experiment more difficult

To change the hypothesis each time

19. A scientist hypothesizes that plant growth increases with water frequency. What is the dependent variable in this experiment?

The type of plant species used

Water frequency

Plant growth

The soil composition

20. Which of the following best describes an independent variable?

The variable that is measured as the outcome

The variable that the researcher deliberately changes or manipulates

A variable that remains constant throughout the experiment

Any variable that affects multiple experiments

GED Science Experimental Design and Evidence Quiz

1. In scientific research, what does 'bias' refer to?

2.

What first name or nickname would you like us to use?

2. A graph shows that as temperature increases from 0°C to 30°C, enzyme activity increases. Above 30°C, activity decreases. This pattern suggests the enzyme has an optimal ____.

3. In peer review, researchers evaluate each other's work to ensure ____.

4. A study shows that increased screen time correlates with lower academic performance. Which explanation is most scientifically sound?

5. A clinical trial tests a new drug against a placebo. Which statements are true? (Select all that apply)

6. Which of the following are examples of quantitative data? (Select all that apply)

7. True or False: An experiment with a p-value of 0.05 proves the hypothesis is definitely correct.

8. True or False: A hypothesis must be testable and falsifiable.

9. The process of drawing general conclusions from specific observations is called ____.

10. A researcher tests whether a new fertilizer improves crop yield. The independent variable is ____.

11. In a controlled experiment, what is the purpose of a control group?

12. A scientist observes that ice melts faster in salt water than in fresh water. What is the next logical step?

13. A sample size of 50 subjects is used to test a medication. Why is this better than a sample of 5?

14. Which type of graph best displays the relationship between two continuous variables?

15. A study finds that students who eat breakfast score higher on tests. Does this prove breakfast causes better test performance?

16. What does it mean for data to be reliable?

17. A researcher studies the effect of temperature on enzyme activity. Which factor should be kept constant?

18. Why is it important to replicate an experiment multiple times?

19. A scientist hypothesizes that plant growth increases with water frequency. What is the dependent variable in this experiment?

20. Which of the following best describes an independent variable?