Justin is planning his science fair project. he wants to measure how oxygen levels affect the rate of photosynthesis in plants. is this an example of a scientific investigation or an experiment?
group of answer choices
an experiment because it tests a cause and effect relationship
an experiment because it does not ask a testable question
an investigation because it uses only observations
an investigation because there is a control group
Answers: 2
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Classify each statement about effective nuclear charge, zeff, as true or false.
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How is 0.00235 expressed in proper scientific notation? a. 2.35 × 10-3 b. 0.235 × 10-2 c. 2.35 d. 2.35 × 103
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Chemistry, 22.06.2019 07:30
Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?
Answers: 1
Justin is planning his science fair project. he wants to measure how oxygen levels affect the rate o...
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