Chemistry, 11.06.2021 22:10 amandarenee4296
A student hypothesizes that one of the three streams near the school has higher than normal lead content. At the same time each day, the student uses a water testing kit to measure the lead content from the three streams near the school. Which is the independent (manipulated) variable in the investigation?
The chemicals used to test the water in the streams
The three streams that are tested
The time of day when the streams are tested
The amount of water collected from each stream
Answers: 3
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