Analyzing Data and Drawing Conclusions

Question 1

You can control accuracy by choosing the appropriate tool or instrument and using it carefully. How could the students in the following questions improve their accuracy?Tyrrell wanted to measure the growth of tomato plants in response to different types of fertilizer. Which tool would be most accurate?

Revolt · Accepted Answer

B: metric ruler

Question 2

Marcy uses pH strips to measure the pH of water samples from several ponds in the city park. Which reason explains why using a pH meter would improve the accuracy of her data?

Revolt · Accepted Answer

C: The pH meter can distinguish between smaller differences in pH than pH strips can.

Question 3

Rajesh designed an experiment to test the effect of fertilizer on plant growth. The table on the right shows the data he collected. Which changes should Rajesh make to his experiment to improve the validity of the data? Check all that apply.

Revolt · Accepted Answer

B: Measure the growth of a plant that did not receive fertilizer.; C: Perform additional trials.

Question 4

Which variable is the dependent variable?

Revolt · Accepted Answer

B: carbon dioxide reproduced

Question 5

According to the graph, the pansies in which treatment group grew about 0.2 cm between weeks 2 and 3?

Revolt · Accepted Answer

B: Liquid

Question 6

Which axis should be used to represent the dependent variable?

Revolt · Accepted Answer

B: y-axis

Question 7

How much did the pansies receiving slow–release fertilizer grow from week 1 to 3?

Revolt · Accepted Answer

C: about  2.1 cm

Question 8

What type of graph should be created?

Revolt · Accepted Answer

B: line graph

Question 9

Which of the following sentences best describes what happened to the pansies receiving liquid fertilizer?

Revolt · Accepted Answer

A: They grew more during week 1 than any other week.

Analyzing Data and Drawing Conclusions Answers

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