Biology

9th -

10thgrade

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AH Biology Homework 1

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  • 1. Multiple Choice
    30 seconds
    1 pt
    Two students, Carmen and George, determined the mass of an object on two different balances. The accepted mass of the object was 2.355 g. George obtained values of 2.531 g, 2.537 g, 2.535 g and 2.533 g. Carmen obtained values of 2.350 g, 2.404 g, 2.296 g and 2.370 g. Which statement best describes the results that were obtained by George and Carmen?
    George's results were more accurate that Carmen's.
    Carmen's results were less accurate than George's.
    George obtained the better precision.
    Carmen obtained the better precision.
  • 2. Multiple Choice
    30 seconds
    1 pt
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    Students did an experiment to determine if a substance contained glucose. To determine if glucose was present, they added 5 mL of Benedict's solution to a test tube of corn syrup and then heated the mixture. A change to a brick red color was a positive indicator for glucose. Which piece of equipment provides the most precise measurement of the volume of the Benedict's solution?
    A - Test tube
    B - Graduated Cylinder
    C - Beaker
    D - Erlenmeyer flask
  • 3. Multiple Choice
    30 seconds
    1 pt
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    A student observed a plant near a window growing toward the window. The student hypothesized that environmental conditions affect the growth of plants. The table shows the student's protocol for an investigation.
    A. Develop a conclusion
    B. Investigate multiple variables
    Repeat the controlled investigation
    Compare the results with a published work.
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