Give all answers ........
Answers
Answer:
Q1. What do you mean by environment?
Answer :- Environment means all those conditions which are necessary for the existence of living things.
Q2. What is the meaning of cultural environment?
Answer :- The socio-cultural environment develops due to the mutual relationship between man and natural environment.
Q3. Name five polluted rivers of India?
Answer :- The ganga, hugli, damodar, gomti, yamuna, godawari, rivers are polluted.
Q4. What is global warming?
Answer:- Heat is stored in the lower atmosphere and its temperature increases this is called global warming.
Q1. How does air or noise pollution affect human health? explain.
Answer:- Disturbance of balance among the various gases in the air or the presence of unwanted gases is known as air pollution any sound that disturbs the mental activities is known as noise pollution.
Q2. How do radio active substance spread pollution?
Answer:- Due to the use of nuclear elements for various purposes radioactive particles enter the atmosphere and produce radio active pollution uranium thorium schizium plutonium cobalt, strontium etc are radio active substance used in nuclear processes they are the cause radio active pollution.
Q3. Differentiate between pollution and pollutants.
Answer :-
Pollution.
The unwanted change occurring in the natural state and balance of the environment is known as the environment pollution.
Pollutants.
The unwanted and harmful substances which are present in the access quantity are called pollutants.
Q4. Explain the problem of ozone depletion?
Answer :- It is about 20-35 kilometre above the sea level in the atmosphere this layer act of the ultraviolet rays coming from the sun and thus protects the living beings on the earth Ozone is a composite group of atom due to the excessive use of chloro fluoro carbon (CFC) in applians such as refrigerators and air conditioners a hole is causes in the ozone layer.
Q5. What is soil pollution? What are its ill effects?
Answer :- any unwanted change in the physical chemical and biological tributes of the Earth which destroys the fertility and utility of land and soil pollution. Soil pollution and litter make the visible land dirty due to the deposition of the waste or coarse material the land becomes unsuitable for other uses there is danger of soil erosion land slides and conversion of land into ravines.
Q6. what do you understand by population. explains.
Answer :- Enormous growth in the number of human beings has resulted in population explosion human life span has improved due to progress in the field of medicine the mortality rate has come, down deaths due to aliments, drought, war etc are the decline.
Q7. What is deforestation? List the reasons of deforestation?
Answer:- Deforestation means irriatonal cutting of forests or plants from some regions reduction of forests is the result of human effort.
Reasons.
- In the old methods of shifting cultivation trees were cut and burnt.
- Due to the construction of huge dams.
- Distribution of electricity and spread of railways and roads extension of habitat areas and cutting of trees for fuel and industries forests have been harmed.
Q8. How does overgrazing affect the quality of lands?
Answer:- Excessive use of forest land for grazing and intade of vegetation by domestic animals is called excessive grazing as a result vegetation from does not grow again very fast in these areas the ill effect is that the layer of vegetation from land is destroyed due to soil erosion the danger at spread of desert arises.
Q9. Describe the process of shifting agriculture.
Answer :- This is the oldest method of farming land was prepared by cutting and burning trees after sometimes nemal peace of land was prepared this called shifting agriculture.
Q10. Insecticides should not be used in excess amount why?
Answer:- These chemical fertilizer and insecticides enhand the production but they effect adversely on human health.