Soil Retention

mineral particles

organic matter (dead and decaying plants and animals)

water

air

sand

loam

clay

Only ONE variable changes in an experiment

Independent variable-the thing we change

Dependent variable-the results

Constants-Everything that stays the same (amount of soil, amount of water, time, etc.)

175 ml of each soil (loam, sand, clay)

3-175 ml measuring cups

3 coffee filter

3 funnels

3 large graduated cylinders; 3 medium graduated cylinders

300 ml water

timer

Do the experiment (minimum 3 trials)

Record the data

Explain data using graphs/tables

Explain results

Conclusion-was your hypothesis right or wrong? Why is this important in the real world?