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Measuring Lengths of 2-Dimensional Shapes to Calculate Area, Measuring…
Measuring Lengths of 2-Dimensional Shapes to Calculate Area
Obtain 2 shape sheets (one rectangle and one circle) from the instructor.
Record the ID code on the data sheet.
Use a metric ruler to measure and record the length and width of the rectangle and the diameter of circle.
Calculate the area and circumference of the circle and the area and perimeter of the rectangle.
Measuring Lengths of 3-Dimensional Shapes to Calculate Volume and Surface Area
Obtain a wooden shape
Measure and record the dimensions of the wooden block.
For a cube or rectangle, measure the length width, and height
For a cylindrical block, measure the height and diameter
For a spherical block, measure the circumference
Calculate the volume and surface area of the wooden shape using the measurements and the formulas.
Determining Mass by Difference
Obtain a 100 mL beaker and measure its mass.
Always use the same balance to measure
Zero the balance by using the tare button.
Weigh the beaker and record the mass (include all digits displayed)
Remove the beaker and place 2 scoops of the substance, then record the mass (include all digits)
If a spill occurs, clean up right away and dispose properly
Subtract the mass of the beaker from the total mass to determine the mass of the sugar.
Measuring Volumes Directly
Notice 3 different volumes of a liquid needed to be recorded.
Record the 100 mL beaker volume, including all of the displayed digits, and an estimated digit of uncertainty.
Record the 10 mL beaker volume, including all of the displayed digits, and an estimated digit of uncertainty.
Record the buret volume, including all of the displayed digits, and an estimated digit of uncertainty.
Determining the Density of Water
Measure and record the mass of a clean, dry 100 mL graduated cylinder. Record all displayed digits.
Pour 40-50 mL of deionized water into the graduated cylinder, while keeping the outside dry.
Record the total mass, and the difference, including all digits displayed.
Record the volume using the correct amount of significant figures.
Finally, find the density by using the formula D= m/V
Measuring Volume by Displacement and Calculating Density
Find the mass of an empty, clean beaker.
Carefully drop 20 grams of aluminum pellets into the beaker and then find the difference of the masses and record it.
Find a 100 mL graduated cylinder and pour in 30-35 mL of water. Record the volume in correct units
Add the 20 grams of aluminum pellets to the graduated cylinder of water and cover them in water. Record the new volume of the pellets and water together.
Calculate the difference in volume between the pellets and record the data.
Calculate the density of aluminum using the mass and volume of the pellets through the the D = m/V formula.
Determining the Thickness of Aluminum Foil
Find a rectangular piece of aluminum and measure the length and width of the foil.
Fold the sheet into a small square and using the balance measure its mass.
Using the dimensions of the aluminum foil and the density of aluminum, find the thickness of the foil. Additionally use the definition of density and its formula to find the volume of the rectangular box.
