Ch 16

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Question 1 of 10 0% read

1. Which statement best describes a conclusion?

A A guess before experiment

B A summary based on data

C Raw data

D A hypothesis

2. The variable that responds to changes is called:

A Independent variable

B Controlled variable

C Dependent variable

D Fixed variable

3. Scientific data should be recorded:

A Later from memory

B Accurately at the time

C Roughly

D Without units

4. David is analyzing data from an experiment on the rate of reaction. He calculates the average rate from multiple trials. Why is it important to repeat experiments and collect multiple data points?

A To increase the accuracy and reliability of the results

B To make the experiment more time-consuming

C To confuse the results

D To avoid using a control

5. Zara is conducting an experiment on the rate of reaction. She measures the time it takes for a reaction to complete. What is the unit of measurement for time in the SI system?

A Second

B Minute

C Hour

D Millisecond

6. Victor is analyzing data from a reaction. He notices that the data points on his graph form a straight line. What does a straight line graph indicate about the relationship between variables?

A It is a direct proportional relationship

B It is an inverse relationship

C There is no relationship

D It is a quadratic relationship

7. Rachel is analyzing data from an experiment. She finds that the median and mean are different. What does this indicate about the data distribution?

A The data is normally distributed

B The data is skewed

C The data has no outliers

D The data is perfectly symmetrical

8. Systematic errors mainly affect:

A Precision

B Accuracy

C Repeatability

D Graphing

9. A trend in data refers to:

A Random values

B A general pattern

C An error

D A conclusion

10. Ahmed is collecting data on the pH of different solutions. He uses a pH meter to measure the pH. What type of data is pH measurement?

A Qualitative data

B Quantitative continuous data

C Quantitative discrete data

D Ordinal data

Ch 16

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