Name: _______________________________________________ Science 5Grade and Section: _____________________________________ Date Performed: _________________

Composition of SoilExperiment No. 3

Soil is a mixture of different materials found in the upper part of the earth’s layer. It is very important because it supports plant life by supplying the plant with the necessary nutrients essential for growth and development. Soil takes hundred of years to form.

I. Stating the Problem ____________________________________________________________________________________________ ____________________________________________________________________________________________

II. Hypothesis Statement ___________________________________________________________________________________________ ___________________________________________________________________________________________

III. Materials Soil sample (about ½ cup), magnifying lens, bottle/jar with cover, water, stirring rod and ruler

IV. Procedure A. Examine the soil using the magnifying lens. Touch the soil and feel its texture. Record your observation of the texture. B. Pour water into the bottle until it is half-full. You may use a beaker as an alternative container. If the mouth of the bottle is

narrow, you may ask for a funnel to avoid water from spilling. Put a handful of soil into the bottle. What did you see? What does this indicate? Record your observation.

C. Stir the mixture thoroughly. Let it settle for 10-15 minutes. Observe what happens. D. Place your set up where it can not be disturbed and continue your observation for another week. E. Measure the height of the layers of materials that where formed. Use the centimeter (cm) unit. V. Data and Observations

A. Chart. Draw the set up at the start and at the end of the observation days. Write your observation properly and accurately.

Set-up Description ObservationA. At the start of the Set up (Day 1)

B. After 7 days (Day 7)

Texture of the soil

Upon dropping the soil into the water

What happened?

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B. Questions

1. Which material settled faster and easily at the bottom of the container?

2. What is the material found in the 2nd layer from the bottom? What was its height in centimeter?

3. What is found in the topmost layer? Give it’s height in centimeter.

4. Describe the floating materials on the water?

5. What materials make the soil?

VI. Interpretation ________________________________________________________________________________________________________ ________________________________________________________________________________________________________

VII. Conclusion I therefore conclude that ___________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________