Population Explosion and It's Causes

Q.

The number of organisms in population are added by

1. emigration

2. Immigration

3. Birth

4. both (a) & (b)

Q.

July 11 is

1. World Environment Day

2. World education Day

3. World Population Day

4. World AIDS Day

Q.

People are living for longer periods and are reproducing lesser than ever before.

1. False

2. True

Q.

Main causes of population explosion are

1. Improved technology
2. Famines
3. Wars
4. Large epidemics

Q.

Which of the following statements defines the density of population?

1. Absolute number of people added every year.

2. Change in the number of inhabitants of a country during a specific period of time.

3. Number of persons living per unit area.

4. Number of persons living in a country.

Q.

If the population grows at the rate of 1.8 $\%$ then the mass of people and mass of earth will become equal in about -

1. 500 years

2. 3000 years

3. 780 years

4. 2400 years

Q. The population of the world in 2016 is about

1. 500 million
2. 100 million
3. 15.6 million
4. 7.4 million

Q.

As of 2015, the world’s population has touched

1. 4 billion

2. 5 billion

3. 6 billion

4. 7 billion

Q.

The number of live births per thousand persons in a year is termed as -

1. Death Rate

2. Population growth

3. None of these

4. Birth Rate

Q.

In India, human populations heavily weighted towards the younger age groups as a result of______

1. Short life span of many individuals and low birth rate

2. Short lifespan of many individuals and high birth rate

3. Long life span of many individuals and low birth rate
   

4. None of these