Chemistry
cjackman81
18

PROJECT: SOIL PARTICLES Describe how particle size affects the settling of soil. Materials 1 1/2 cups potting soil 1/2 cup sand 2 wide-mouthed juice bottles with lids Masking tape Pen Spoon Water Directions Make masking tape labels for each juice bottle. Label one "soil" and the other "soil and sand." Fill both bottles 3/4 full of water. Slowly pour 1 cup of soil into the water in the "soil" bottle. Observe the behavior of the soil particles. Fill the "soil" bottle the rest of the way with water. Secure the lid tightly and shake the bottle. Put the bottle on a flat surface where nothing will disturb it. Add the 1/2 cup of sand to the remaining 1/2 cup of soil. Mix thoroughly with the spoon. Slowly pour the sand and soil mixture into the water in the "soil and sand" bottle. Observe the behavior of the particles. Fill the "soil and sand" bottle the rest of the way with water. Secure the lid tightly and shake the bottle. Put the bottle on a flat surface where nothing will disturb it. Leave both bottles undisturbed overnight. Look at the bottles the next day. Record your observations. Questions What did you notice about the way the soil particles sank in the water? How was it different from the way the soil and sand particles sank? What does the soil look like in the "soil" bottle? How is it different from the soil in the "soil and sand" bottle? In the "soil and sand" bottle, which type of soil is on the bottom? Why? The amount of each size particle in soil is the particle size distribution. Do you think this is a good way to determine particle size distribution? Why or why not?

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(1) Answers
coolkid214

Soil particles are larger in Size and clump together, Sand particles are smaller and individual, Soil particles settle faster and will be on the bottom while the sand particles will be on top. And no this is not a good way to determine particle size distribution.

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