Pressure on Natural Resources

Q.

What are the consequences of population explosion?

Q.

Which is a threat to the environment?

1. A growing plant

2. Growing crops

3. Growing population

Q. What are the major factors responsible for population explosion?

Q.

Define the term ‘population explosion’. What are the consequences of population explosion?

Q.

Minerals are renewable resources.

1. True

2. False

Q. Question 4 (a)
What will happen if:
We go on cutting trees.

Q.

Rickets, scurvy and beriberi are deficiency diseases which appeared mainly due to the non-availability of proper food.

1. True

2. False

Q. What is meant by realised natality and realised mortality? [2 MARKS]

Q.

A set of ecosystem is called a

1. Biome

2. Climate

3. Subsystem

4. Structure

Q.

Which amongst the following is not the consequence of deforestation?

1. Soil erosion

2. Droughts

3. Flash floods

4. Biodiversity equilibrium

Q. The process of conversion of fertile lands into deserts is known as:

1. Desertification
2. Acid rain
3. Famine
4. Drought

Q. The process where the fertile land gets converted into deserts is called desertification.

1. True
2. False

Q.

Our resources cannot keep pace with the rising population. Give three examples in support of this statement.

Q.

Production of food rises by__.

Q.

Write a short note on importance of water in biosphere.

Q. A ____is a natural resource which replenishes to overcome resource depletion caused by usage and consumption, either through biological reproduction or other naturally recurring processes.

1. renewable resource
2. replenishable resource
3. non-renewable resource
4. non-replenishable resource

Q. The micro-populations within a species population showing genetically fixed morphological variations in response to ecological factors are called ____________.

1. Ecads
2. Ecotypes
3. Ecophenes
4. Syntypes

Q.

The various populations of living organisms in an area together form ____________.

Q. Reason for rise in population is

1. Healthy habits and high standard of living
2. Preventive medicines and advanced medical technology
3. Control of famine and epidemics
4. All of the above

Q. Population explosion is the root cause for depletion of natural resources. Explain.

Q.

Which of the following is mainly responsible for the depletion of natural resources?

1. Both Options 1 & 2

2. Neither options 1 nor 2

3. Humans

4. Animals

Q. What are the factors could lead to the rise of a new species?

Q. All variations in an organism have an equal chance of survival.

1. False
2. True

Q. Define population growth and write the problems created due to population growth.

Q.

What is a depletion base?

Q. The alarming population growth is leading to scarcity of basic requirements. Suggest with reasons, any two population control measures other than contraception to address the situation.

Q. Answer the following questions: [5 MARKS]
(a) Which is the sign of family welfare in our country?
(b) What is population explosion?
(c) What factors govern the growth of population?
(d) List three factors that have contributed to an increase in human population.

Q.

The problems such as flood, soil erosion, extinction of wild species and global warming can be reduced to an extent by_____

1. deforestation

2. using manure

3. afforestation

4. using pesticides

Q. Value based questions.
How DDT is responsible for a decline in bird population?

Q.

Production of food increases in_________

1. Geometrical progression

2. Harmonic progression

3. Arithmetic progression

4. Exponential progression