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Metric Measurement Lab (2 Days required)/32 possible pointsPart A: Count your drops!Take a guess - How many drops of water will it take to equal 1 milliliter? _____ drops (1pt.)Follow the directions to find the number of drops in 1 milliliter of water, and then answer the questions. You will need a small graduated cylinder (25 ml), a beaker of water, and an eyedropper for this section.? Remember to read the bottom of the meniscus when you are reading the volume of a liquid in a graduated cylinder.Fill a small graduated cylinder with 10 ml of water. Count the number of drops it takes to raise the water to 11 ml. Record the number in the chart. Leave the water in the graduated cylinder and count the number of drops it takes to raise the water to 12ml. Record the number in the chart. Leave the water in the graduated cylinder and count the number of drops it takes to raise the water to 13ml. Record the number in the chart. Calculate your average (mean) and round to the nearest tenth.? ?(4pts. for chart)31750-81280000# of drops to 11 ml# of drops to 12 ml# of drops to 13 mlAverage? ????Based on your average (mean), how close were you to your guess? ________ (1pt.)?Based on your average, how many drops would it take to make 1 liter? _______ (1pt.)Part B: Water DisplacementFollow the directions to find the volume of three marbles using water displacement.Add 20 ml of water to a 100 ml graduated cylinder. Record this amount in the chart. Add three marbles to the cylinder and measure the volume. Record this amount in the chart. Find the difference between the two measurements and record in the chart. The difference between the two measurements will be the volume of the three marbles. (4pts for chart)Volume of Water Before adding Marbles (ml)Volume of Water After Adding Marbles (ml)Difference in Volume (ml)Volume of 3 Marbles? ????Part C: Mass ManiaThe gram is the standard unit of mass in the metric or SI system. The basic instrument used to measure mass is the mass balance.? Some mass measurements can be made using an electronic balance.??Check to see that the Pointer is pointing to zero. If it is not, check to see that all the Riders (weights) are all the way to the left at the Zero mark. Adjust the balance by turning the Adjustment Screw slowly until it points to zero. Place your metric ruler on the pan and read & record the ruler's mass. After resetting the balance to Zero, measure and record the mass of the empty 50-ml graduated cylinder and then the 3 marbles. Reset the balance to ZERO when all items have been massed. (3pts. for chart)Mass of Metric Ruler (g)Mass of Empty 50-ml graduated cylinder (g)Mass of 3 Marbles (g)? ???Part D: Volume by FormulaUse the formula to find the volume of the box below. Measure to the nearest centimeter before calculating your answer.? If necessary, Round your answer to Two Decimal places.Volume = length x width x height(1pt.)__________ x __________ x __________ =________________cm3Part E: Color Challenge1. Obtain the following items from your teacher:3 beakers with colored water- 25 ml of each color (red, blue, and yellow) 1 graduated cylinder (25 ml - 50 ml) 1 eyedropper 6 test tubes labeled A, B, C, D, E, and F 2. Perform each step outlined below using accurate measurements.Measure 17 ml of RED water from the beaker and pour into test tube A. Measure 21 ml of YELLOW water from the beaker and pour into test tube C Measure 22 ml of BLUE water from the beaker and pour into test tube E. Measure 5 ml of water from test tube A and pour it into test tube B. Measure 6 ml of water from test tube C and pour it into test tube D. Measure 8 ml of water from test tube E and pour it into test tube F. Measure 5 ml of water from test tube C and pour it into test tube B. Measure 2 ml of water from test tube A and pour it into test tube F. Measure 4 ml of water from test tube E and pour it into test tube D. 3. Complete the chart. (6pts.)Test TubeColorFinal Volume (ml)A??B??C??D??E??F??Part F: Biomechanics of the Meter Stick Drop: Challenge Worksheet Materials:One meter stick or ruler per group, one worksheet per student Introduction: In the video, the students discussed performing a meter stick drop to determine their reaction times to the visual stimulus of a falling ruler. You will now perform the same activity for the purpose of determining the time it takes for you to react and catch a falling ruler. Roles: Before data collection begins, designate one person to be the Catcher—the person who catches the ruler and the person who the collected data will refer to. Another person should be the Dropper—the person who will hold the meter stick in place and then drop it for the Catcher to attempt to grab. If there are only two people in your group, either the Dropper or Catcher should record the data down after each drop. Throughout the course of the experiment, each group member should take a turn being Dropper, Catcher, and Recorder. Procedure: 1. The Dropper will hold a meter stick vertically between the thumb and index finger of the Catcher’s open hand. The meter stick should be held so that the zero mark is level with the tops of the Catcher’s fingers. The Catcher should not be touching the meters stick before it falls. 2. Without warning, the Dropper should release the meter stick so that it falls between the Catcher’s thumb and finger. 3. The Catcher should catch the meter stick as quickly as possible. 4. The Recorder writes down the distance, in centimeters, the meter stick fell through the Catcher’s fingers. 5. Repeat steps 1-4 until there is data for ten trials. 6. Switch roles and record data for the reaction times of the other group members. Data: Record the distance the meter stick fell in the “Distance” column. Use the formula below to calculate the Catcher’s reaction time based on the distance the meter stick fell. Remember that the amount of time the meter stick was in the air is the same as the amount of time it took the Catcher to react to seeing it fall. d = ? gt2 d = the distance the meter stick fell, in cm g = the acceleration of gravity, 9.81 m/s2 t = the time the meter stick was falling, in s Be sure to convert the distance fell from cm to m before plugging it into the formula! (3pts. for accurate averages)Person 1 Person 2 Person 3 Trial # Distance (cm) Reaction Time (s) Distance (cm) Reaction Time (s) Distance (cm) Reaction Time (s) 1 2 3 4 5 6 7 8 9 10 Average: Average: Average: Analysis: 1. In the data table, calculate your reaction time for each trial. 2. Calculate your average reaction time. 3. Record your partners’ data as well so that you can compare your data in the next section. Questions: (Each person in the group should answer the questions for their own reaction time data unless the question specifically asks for comparison with group members’ data.) 1. Were any of your trials very different from the other ones? If so, explain why they were so different. If not, explain how you were able to be so precise and consistent in your data. (2pts.)2. Most, if not all, of your distances and reaction times will be different from each other. How can you explain this? (2pts.)3. Name any possible errors you might have introduced or made during the experiment. (2pts.)4. Whose reaction time was faster, yours or your partners? List at least three factors that could explain why different people have different reaction times. (2pts.) ................
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