Metric Measurement Lab 
Part A: Count your drops!
Take a guess – How many drops of water will it take to equal 1 milliliter? _____ drops
Follow the directions to find the number of drops in 1 milliliter of water, 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.

# of drops to 11 ml  # of drops to 12 ml  # of drops to 13 ml  Average 

Based on your average, how close were you to your guess?________
Based on your average, how many drops would it take to make 1 liter? _______
Part B: Water Displacement
Follow 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.
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 Mania
The 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.

Mass of Metric Ruler (g)  Mass of Empty 50ml graduated cylinder (g)  Mass of 3 Marbles (g) 

Part D: Volume by Formula
Use the formula to find the volume of the box. Measure to the nearest centimeter before calculating your answer. If necessary, Round your answer to Two Decimal places.
Volume = length x width x height
__________ x __________ x __________ =________________cm3
Part E: Color Challenge
1. 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.
Test Tube  Color  Final Volume (ml) 
A  
B  
C  
D  
E  
F 