Week 1 Lab - Introduction to Science Question Set

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Arizona State University *

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Chemistry

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Apr 3, 2024

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docx

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Week 1 Lab : Introduction to Science Question Set (Use as Study Guide) 1. Which of the following could NOT be revealed by experimental data? The hazard warnings for the chemicals used in the experiment (the safety and hazard information for every chemical in an experiment should be looked up at read PRIOR to beginning the lab.) 2. A general chemistry student performs an experiment in which two liquids are mixed and, as soon as they meet, a white solid forms in the solution. Which of the following is a qualitative observation that could be derived from the result from this experiment? Choose all that apply . The solid formed is white The solid forms quickly after the liquids are mixed (both are qualitative observations that could be derived from the result of this experiment) 3. All of the following are general rules which should be followed during an experiment EXCEPT: There must always be quantitative data (CORRECT! This statement is not always true. The result of an experiment may be qualitative) 4. Match the term with the best definition of the term. Independent variable – a variable in an experiment that is changed by the scientist and is used to construct a hypothesis dependent variable – a variable in an experiment whose value depends on that of another variable control – a factor in an experiment that could affect the results of the experiment but do not reflect the planned changes variable – a defined, measurable component of an experiment 5. True or False . Multiple independent variables can be tested in a single experiment. False (if multiple variables are manipulated in an experiment, it is not clear which variable causes the experimentally observed results)
6. A study is being done to test the effects of habitat space on the size of fish populations. Aquariums of various sizes are set up with six goldfish in each one. Over a period of six months, the fish are fed the same type and amount of food. The aquariums are equally maintained and cleaned throughout the experiment. The temperature of the water is kept constant. At the end of the experiment the number of surviving fish are surveyed. What is the independent variable ? The sizes of the aquariums 7. Suppose you conduct one experiment and find that the E = mc^3, rather than the historically accepted formula E = mc^2. What should you do next? Repeat the exact same procedure 8. Which of the following is NOT a true statement about a “hypothesis?” Scientists create hypotheses without considering existing data 9. True or False . A testable hypothesis (or question) asks how the dependent variable has an effect on the independent variable. False 10.When running an experiment, it is recommended that the experimenter conduct multiple trials. Select all the benefits of repeating trials in an experiment. Choose all that apply . A qualitative or quantitative conclusion can be drawn from the data A scientist is able to determine rather the results of an experiment, as a whole, show consistency A decision can be made whether the results support or contradict the initial hypothesis 11. What does the prefix “ kilo ”- mean? 1000.0 12.Which of the following correctly expresses 0.000000000172 in scientific notation? 1.72 X 10^-10
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