use data table a below and a calculator to determine the percentage of total depth that each layer represents.
i. divide the depth of the layer by the total depth. for example, to calculate the percentage of the total depth that the crust represents, divide 40 by 4,956.
ii. write your answer in the percent column.
iii. repeat for the rest of the layers.
b) use the calculator to determine the depth in centimeters for each layer. this is the depth of sand you will put in your jar.
i. multiply the depth of the jar, 16.5 cm, by the percent you calculated for the crust.
ii. write your answer in the centimeters column.
iii. repeat for the rest of the layers.