wel we givell questions Very shortly :-
6 x 2 =12
A. What is sex ratio?
B. What do you mean by density of population?
C. What are emigration and immigration?
D. Define urbanisation.
E. What do you mean by disaster?
F. When do flood occur in India?
2. Answer the given questions briefly :-
4 x3 = 12
A. Write about the factors that affect distribution of population.
B. State any three negative impact of migration.
C. List any three factors responsible for urbanisation of a place.
D. State any three positive effects of brain drain.
3. Answer the given questions :-
4 x 4 = 16
A. Mention any four precautionary measures to be adopted to mi
effects of flood.
B. Why is disaster management important?
C. Briefly explain about the components to population change.
D. Briefly explain the positive impacts of urbanization.
Answers
1.) The sex ratio is the ratio of males to females in a population. In most sexually reproducing species, the ratio tends to be 1:1. This tendency is explained by Fisher's principle. For various reasons, however, many species deviate from anything like an even sex ratio, either periodically or permanently
2.)Population density is the number of individuals per unit geographic area, for example, number per square meter, per hectare, or per square kilometer.
3.) Emigrate means to leave one location, such as one's native country or region, to live in another. Immigrate means to move into a non-native country or region to live.
Emigrate means to leave one's country to live in another. Immigrate is to come into another country to live permanently. Migrate is to move, like birds in the winter. ...
4.) Urbanisation is an increase in the number of people living in towns and cities. Urbanisation occurs mainly because people move from rural areas to urban areas and it results in growth in the size of the urban population and the extent of urban areas.
5.) A disaster is a sudden, calamitous event that seriously disrupts the functioning of a community or society and causes human, material, and economic or environmental losses that exceed the community's or society's ability to cope using its own resources. Though often caused by nature, disasters can have human origins.
6.)Floods mainly occur because of natural activities like earthquake.
hope it helps you✌