Question

Name two experiment to test the for the presence of micro organisms in the soil

Answer 1

Answer:

Explanation: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.ay up to 4 hours.

Conclusion

Soil contains living organisms.

Answer 2

process 1

When living organisms breathe they give out carbon dioxide gas as a waste product. Carbon dioxide gas can be detected (identified) using a carbon dioxide indicator solution called bromothymol blue.

process 2

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.

source

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 its help ful