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Holt McDougal Modern Chemistry Chapter 2: Measurements and Calculations Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. In an indirect proportion (y=k/x), x = 4 when y = 2. What is the constant of proportionality k?

Question 2 2. What is the density of a solid that has a mass of 9.2 grams and a volume of 12.3 cm3 ? Would this object float or sink in water?

Question 3 3. Which of the following best describes control variables?

Question 4 4. Elton Mayo and Fritz Roethlisberger, as part of the Hawthorne Studies, realized it was not the change in the lighting that was affecting the workers' productivity. Instead, it was simply the fact that an individual was concerned about the workers and their environment. Which step in the scientific method does this address?

Question 5 5. If you add 50.0 mL of water to a beaker containing 22 mL of water, then how much water do you have in the beaker?

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Question 6 6. This is a branch of knowledge and the systematic study of the universe and all it encompasses, one that is based upon facts, observation, and experimentation:

Question 7 7. In a direct proportion (y = kx), x = 2 when y = 6. What is the constant of proportionality k?

Question 8 8. If you graph a proportion and it forms a straight line, what kind of proportion is it?

Question 9 9. Which of these following words should be avoided when creating your own hypothesis?

Question 10 10. Compared to Earth, about how much gravity is there on the moon?

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Question 11 11. As part of the famous Hawthorne Studies back in the 1920's, Elton Mayo and Fritz Roethlisberger wanted to know, 'Could certain environmental conditions, such as improved lighting, make employees work more efficiently?' Which step in the scientific method does this address?

Question 12 12. Which of the following are arranged from smallest unit to largest unit?

Question 13 13.

Jamar ran 100 m in 25 seconds. How many meters did he run in 60 seconds?

(Hint - Use the inverse proportion: time = distance/speed)

Question 14 14. A group of researchers are studying how plants grow in very harsh climates. During one of their experiments, they accidentally left the window open for 2 hours, causing that group to have the best results. In this scenario, what variable is sunlight?

Question 15 15. The steps of the scientific method include: Ask a question, _____, Form a hypothesis, Test the hypothesis & collect data, Analyze data, and _____.

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Question 16 16.

You measure the mass of a block five times and get the following values: 0.48 g, 0.51 g, 0.50 g, 0.49 g, 0.50 g

The true mass is known to be 0.60 g. How would you characterize your measurements?

Question 17 17. If I release 10 spiders into a room and measure how long it takes people to get out of the room, what is the independent variable?

Question 18 18. What is the mass of a liquid with a density of 2.12 g/mL and a volume of 53.0 mL (to the nearest gram)?

Question 19 19. Which best describes weight?

Question 20 20. A set of principles laid out as being unquestionably true is known as:

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Question 21 21. Which of these was not included as part of creating a hypothesis?

Question 22 22. You conduct a study of reaction times by placing a plastic spider on a person's chair right before they sit down and recording their reaction time. You repeat the study, but this time you yell ''SPIDER!'' right before the person sits down and again measure their reaction time. Why can your yelling ''SPIDER!'' be considered a moderating variable?

Question 23 23. Simge's guinea pig weighs exactly 560. grams. Which of the following most accurately expresses the weight of Simge's guinea pig in scientific notation?

Question 24 24. How many significant figures are in 54,050?

Question 25 25. As part of the Hawthorne Studies, employees were split into two groups. For one group the lighting in their work area was substantially improved for a day, while the lighting in the work area for the other group remained unchanged. Which step in the scientific method does this address?

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Question 26 26. Which of the following is the US measurement for volume?

Question 27 27. If 10 pieces of candy cost 50 cents, how much do three pieces of candy cost?

Question 28 28. Which of the following is the closest to a mass of 500 mL of water?

Question 29 29. Which of the following is the metric unit for mass?

Question 30 30.

An empty container has a mass of 62.000 grams. You fill it with 24.6 mL of a liquid. The final mass of the container is 81.34 grams. What is the density of the liquid to the correct number of significant figures?

(density of the liquid = mass of the liquid divided by the volume of liquid)

Holt McDougal Modern Chemistry Chapter 2: Measurements and Calculations Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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