Question

Write an activity to show that the presence of micro organism in soil and water?

Answer 1

Experiment To Show The Presence Of Living OrganismsApparatus;two conical flask, rubber corks, two soil sample, two muslin bags, strings, lime water and heater.Procedure;Label the conical flask as A and B. Label the muslin bags A and B. Label the two soil sample A and B. Heat sample B well in other to kill living organisms found in it. Insert both samples into the muslin bag respectively. Attach a string to both bags. Pour into the conical flasks lime water. Suspend the bags into the conical flasks respectively and cork the flasks with the rubber corks. leave the experiment to stay up to 4 hours.sourceObservation;1. After 4 hours, the lime water in conical flask A turned milky. This is because when living organisms respire, they give out carbon (IV) as a by-product. When carbon (IV) oxide dissolves in lime water, it turns it milky. 2. The lime water in flask B remained clear. This is because all the living organisms where destroyed during heating.ConclusionSoil contains living organisms

Answer 2

Apparatus;

two conical flask, rubber corks, two soil sample, two muslin bags, strings, lime water and heater.

Procedure;

Label the conical flask as A and B. Label the muslin bags A and B. Label the two soil sample A and B. Heat sample B well in other to kill living organisms found in it. Insert both samples into the muslin bag respectively. Attach a string to both bags. Pour into the conical flasks lime water. Suspend the bags into the conical flasks respectively and cork the flasks with the rubber corks. leave the experiment to stay up to 4 hours.

Observation;

1. After 4 hours, the lime water in conical flask A turned milky. This is because when living organisms respire, they give out carbon (IV) as a by product. When carbon (IV) oxide dissolves in lime water, it turns it milky. 2. The lime water in flask B remained clear. This is because all the living organisms where destroyed during heating.

Conclusion;

Soil contains living organisms.




@Hope it helps you....