Intro to Chemistry
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15 QuestionsShow answers
  • Question 1
    30 seconds
    Q.

    Which of the following is something you should NOT do in a lab?

    answer choices

    read the label of chemical bottles before using it

    pour unused chemicals back into their original bottles

    use lots of water to wash skin that has been splashed with chemicals

    take only as much as you need of shared chemicals

  • Question 2
    30 seconds
    Q.

    An observation made with your senses

    answer choices

    Qualitative observation

    Quantitative observation

    temperature

    conclusion

  • Question 3
    30 seconds
    Q.

    What is an hypothesis?

    answer choices

    a guess

    a testable, tentative explanation

    a theory

    data

  • Question 4
    30 seconds
    Q.

    What is a manipulated variable (independent variable)?

    answer choices

    the variable that changes as a result of the experiment

    the variable that the scientist changes

    the evidence

    the quantitative observation

  • Question 5
    30 seconds
    Q.

    Based on the graph, what happens to the solubility of CO2 as the temperature increases?

    answer choices

    it increases

    it stays the same

    it decreases

    what is a graph?

  • Question 6
    30 seconds
    Q.

    What is an example of pure research?

    answer choices

    creating synthetic elements to study their properities

    producing heat-resistant plastics for use in household ovens

    finding ways to slow down the rusting of iron ships

    searching for fuel other than gasoline to power cars

  • Question 7
    30 seconds
    Q.

    What is a control?

    answer choices

    a variable that is unchanged to compare results to

    a changed variable

    a hypothesis

    a conclusion

  • Question 8
    30 seconds
    Q.

    Which of the following is an example of quantitative data?

    answer choices

    grey

    oily

    44.2oC

    Copper

  • Question 9
    30 seconds
    Q.

    Which is NOT an SI base unit?

    answer choices

    second

    kilogram

    degree Celsius

    meter

  • Question 10
    30 seconds
    Q.

    What is the correct representation of 702.2g in scientific notation?

    answer choices

    7.02 x 103g

    70.22 x 101 g

    7.022 x 102 g

    70.22 x 102 g

  • Question 11
    30 seconds
    Q.

    A piece of metal has a mass of 61.3g and a volume of 5.84cm3. What is the the metal? Hint: density!

    answer choices

    copper (8.96 g/cm3)

    molybdenum (10.2 g/cm3)

    silver (10.5 g/cm3)

    technetium (11.5 g/cm3)

  • Question 12
    30 seconds
    Q.

    Which of the following shows 229.613 correctly rounded to four significant figures and in scientific notation?

    answer choices

    0.2296 x 10-3

    2.29 x 103

    2.296 x 10-2

    2.296 x 102

  • Question 13
    30 seconds
    Q.

    How many significant figures (digits) are in the number 0.0034051?

    answer choices

    4

    5

    7

    3

  • Question 14
    30 seconds
    Q.

    A 5mL sample of water has a mass of 5g. What is the density of water?

    answer choices

    1 g/mL

    1 mL/g

    25 gmL

    10 gmL

  • Question 15
    30 seconds
    Q.

    What is chemistry?

    answer choices

    the study of matter

    the study of the universe

    the study of science

    the study of numbers

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