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ITBS Level 9 Grade 3 Science 2
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Avg score: 30% • Most missed: “Which of the following statements is best supported by the data?”

Use the information below and your knowledge of science to answer questions below.

Two streams run through a field. One stream is badly polluted, and the other is cleaner. An ecologist measures the average weight of frogs in the two rivers and finds the following information:

 

Average weight in grams

Polluted stream

18

Clean stream

25
ITBS Level 9 Grade 3 Science 2
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2 Questions

1. Which of the following statements is best supported by the data?
2. What is the best way for the ecologist to have measured the average weight of the frogs in each stream?

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