1.16 Quiz Scientific Methods In Chemistry

Question: What is a control?

Answer: A variable or variables that you must keep constant during an experiment.

Question: In an experiment, Shara feeds her rat different brands of rat food (brands X, Y, and Z) each for 2 weeks and weighs the rat over several days during the period of each diet. What is the independent variable?

Answer: The brand of food that Shara feeds the rat.

Question: Which of the following is the best example of a valid hypothesis?

Answer: If I add substance X, then it will lower the temperature at which water freezes.

Question: Kobe is testing whether 100 g of substance A, 100 g of substance B, or 100 g of substance C produces more oxygen in a chemical reaction at 25°C. What is the independent variable?

Answer: The nature of the substances.

Question: A chemist writes a report to his superiors regarding his experiments to make a new compound. Which part of the scientific method is he following?

Answer: Communicating findings.

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