AnswersRVACR EcologyAnalyzing Data and Drawing Conclusions

Analyzing Data and Drawing Conclusions Answers

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1
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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?

A
calipers
B
metric ruler
C
meter stick
2
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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?

A
The pH meter gives a digital readout.
B
The pH meter uses numbers instead of colors.
C
The pH meter can distinguish between smaller differences in pH than pH strips can.
D
The pH strips are more expensive to use.
3

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

A
They grew more during week 1 than any other week.
B
They grew the most between weeks 1 and 3.
C
They grew the least between weeks 3 and 4.
D
Their average growth rate was the same for all 4 weeks.
4

Which variable is the dependent variable?

A
time
B
carbon dioxide reproduced
5

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

A
Control
B
Liquid
C
Slow-Release
6

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

A
about 0.9 cm
B
about 1.4 cm
C
about 2.1 cm

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