Advertisements
Advertisements
Question
Give reasons.
Soil is turned over during tilling.
Solution
Tilling is a mechanical procedure of agitating soil where the top layer is mixed with the lower layers of soil. This promotes the mixing of organic matter throughout the soil and also promotes the growth of microorganisms. These microorganisms help in the conversion of organic matter.
RELATED QUESTIONS
“Solving the problem of pollution is an effective way of environmental management” Justify the statement.
Name the following method of solid waste management.
There is a oil layer on the water surface of river in your area. What will you do ?
Rewrite the following statement using correct of the option and explain the completed statement.
Chemically, vinegar is -- -- --.
An enzyme obtained from fungi to produce vegetarian cheese.
Explain – Importance of microbes in sewage (water) treatment in cities.
Read the following paragraph and write the answers to the questions asked.
Sulphuric acid is present in the acid rain and materials coming out of mines. You know that erosion of metals present in statues, bridges and buildings occurs due to it. Sulphuric acid is a source of energy for some species of bacteria like Acidiphilium spp. and Acidithiobacillus ferrooxidans. Hence, these bacteria can control the soil pollution occurring due to acid rain. Water soluble salts of uranium are present in the wastes produced during electroplating and in effluent released in the environment from the atomic energy plant. Geobacter convert these salts of uranium into insoluble salts and thereby prevent those salts from mixing with groundwater sources.
- What causes metal erosion in statues, bridges and buildings?
- Sulphuric acid is the source of energy for which bacteria?
- What kind of pollution do these bacteria control?
- What are the water soluble salts in atomic energy plants and in the process of electroplating?
- Which bacteria prevent these salts from mixing with ground water by converting them Into insoluble salts?
What is pasteurization?
- Which process is shown in the above given picture?
- Give two examples for liquid fuels and solids fuels obtained by this process.
______ bacteria is used for industrial production of yogurt.
