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Grade 11 Objective 1

1The safest way to dilute concentrated sulfuric acid is to add A a series of small volumes of water to the acid while stirringB the acid to water slowly while stirring constantlyC the acid to a small volume of water and then add more waterD dilute sulfuric acid to a sma

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Grade 11 Objective 1

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    7. 6 The label shown above contains information about some harmful effects of acetone. A group of students plans to use acetone to rinse out a glass container. A second group of students is working at the same lab table. Which of the following lab procedures should the second group of students avoid? A Heating water with an open flame B Pouring hydrochloric acid into a beaker C Filtering precipitates from a liquid solution D Collecting oxygen from plants in a test tube

    26. 25 Which of these could be used to determine whether a substance is a base? A Thermometer B Litmus paper C Balance D Bunsen burner

    27. 26 A medical researcher hypothesizes that a newly developed medication can reduce high blood pressure. Which of these would most likely be the dependent variable in a study involving this medication? A The number of participants in the study B The ages of people treated for high blood pressure with other medications C The blood pressure of the participants in the study D The number of people treated for high blood pressure with other medications

    28. 27 The following hypothesis refers to iron in the topsoil found on an island formed from limestone. Which study would most likely be used to investigate this hypothesis? A Tracking dust clouds with satellite photos B Determining the effects of iron on limestone C Calculating erosion rates in African limestone mines D Analyzing the content of comet dust clouds

    29. 28 The picture above shows a compound microscope. What part of the microscope should be used to adjust the amount of light illuminating a prepared slide? A Eyepiece B Rotating nosepiece C Diaphragm D Coarse-focus knob

    32. 31 Which two pieces of equipment should be added to the materials list for this activity? F Graduated cylinder and metric ruler G Metric ruler and stopwatch H Magnifying glass and balance J Graduated cylinder and balance

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