Which description here characterizes an experiment?

On the following list, which procedure would not be included as part of a valid scientific experiment?

Raul wants to investigate how the angle of a ramp affects the speed of an object rolling down the ramp. He can conduct his investigation in a number of different ways. Which investigation should he perform?

Hillary is dropping objects that are the same volume. She wants to investigate how an object’s mass affects the average speed at which it travels when dropped, until it hits the ground. Which variable must Hillary change during the experiment?

In chemistry, scientists classify some substances as bases. The following are all characteristics of bases. Which observation can you make about a base using the senses alone?

Any good scientific investigation should include a large amount of trials, controlled conditions, and which of the following?

Which statement is a hypothesis?

Two students conduct the same experiment, but they get different results. What should the students do next?

Which of the following is a true statement about any hypothesis?

Which of the following is NOT a true statement about any hypothesis?

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