A class is conducting an experiment on chemical reactions. At what point in the activity would a hypothesis be formed?

Rebecca conducted a study on the effects of sleep deprivation for twelfth-graders during midterm exams. She followed two groups of five students each. After two grading periods, she turned in the data she collected. Which steps were left out?

A class is learning about acceleration due to gravity. Their plan is to climb a ladder and drop different kinds of balls from the same height at the same time. They will repeat this for ten trials and recording data. What is the independent variable?

A group of students wanted to investigate a method to clean the polluted water in a nearby swamp. In their investigation, they tested various environmentally safe cleaning agents. They wanted to compare the different agents. What is the control?

What two things MUST be present in an experiment for the experiment to be valid?

A statement as to why an event occurred that is the basis of an experiment is

Data is another essential part of an experiment. Which of the following is an acceptable form of data communication?

True or False :When forming a conclusion a scientist must evaluate the data collected during the experiment to determine if the data supports or denies the hypothesis before he or she can begin creating a conclusion

A qualitative observation would be

Experiments should always be

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