Population Explosion and Food Crisis

Q. Fill in the blanks, according to the Greenhouse effect.
$1.$ Clouds and gases reflect about $\dots a\dots$ of the incoming solar radiation, and absorb some of it but almost $\dots b\dots$ of incoming solar radiation falls on Earth’s surface heating it, while a small proportion is reflected back.
$2.$ Earth’s surface re-emits heat in the form of $\dots c\dots$ radiation but part of this does not escape into space as atmospheric gases absorb a major fraction of it.

1. a-one fourth, b-one half, c-infrared radiation
2. a-one half, b-one fourth, c-UV radiation
3. a-one fourth, b-one half, c-UV radiation
4. a-one half, b-one fourth, c-infrared radiation

Q. The present day average temperature of the Earth’s surface is

1. ${35}^{\circ }C$
2. ${25}^{\circ }C$
3. ${15}^{\circ }C$
4. ${18}^{\circ }C$

Q. What do you understand by the term "population explosion"? What are the reasons for population explosion?

Q. Carbon cycle occurs through

a. Atmosphere
b. Ocean
c. Living organisms
d. Dead organisms

1. a, b and d
2. a, b, c and d
3. a, b and c
4. a and b

Q. What can you infer from the chart below?

1. As fuel price increases, food price also increases
2. When fuel price drops, food prices also drop
3. Fuel and food prices are not interconnected
4. Data is insufficient to make an inference

Q. Read the following statements and identify the one which is not true about the food crisis in the current age.

1. Improper storage facilities for the produce
2. Unpredictable climate
3. Proper distribution and efficient transport facilities
4. Improper agricultural management

Q. Humans have managed to survive even after battling severe food crises on Earth.

1. True
2. False

Q. The cause(s) of world population explosion is/are:

1. Better health care
2. Improved quality of life
3. Better living conditions
4. All the above

Q. Sudden surge in population is the reason for the lack of availability of resources.

1. True
2. False

Q. Reason for rise in population is

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

Q. Regarding assertion and reason, select the right option.
Assertion [A]: Food crisis is an extreme shortage of food availability which could result in deaths.
Reason [R]: Countries like India, Nepal and Sri Lanka face severe food crises because of the increasing price of food and fuel.

1. A is true and R is false
2. Both A and R are true but R does not explain A
3. Both A and R are false
4. Both A and R are true and R explains A

Q. Assertion :Over population causes a number of socio-economic problems. Reason: A number of bacterial and viral diseases have controlled.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Regarding assertion and reason, select the right option.
Assertion [A]: Food crisis is an extreme shortage of food availability which could result in deaths.
Reason [R]: Countries like India, Nepal and Sri Lanka face severe food crises because of the increasing price of food and fuel.

1. Both A and R are true and R explains A
2. Both A and R are true but R does not explain A
3. A is true and R is false
4. Both A and R are false

Q. To meet energy crisis what other sources can be exploited?

1. Wind
2. Water
3. Nuclear
4. All of the above

Q. Control of famines and epidemics is one of the reasons for the surge in population.

1. False
2. True

Q. In order to sustain our resources for the future we should depend less onsources of energy and depend onenergy.

1. renewable
2. sustainable
3. non-renewable
4. non-sustainable

Q. Humans have managed to survive even after battling severe food crises on Earth.

1. True
2. False

Q. July 11 is observed as

1. World Population Day
2. World Environment Day
3. No Tobacco Day
4. World Health Day

Q. Sudden surge in population is the reason for the lack of availability of resources.

1. True
2. False

Q. are human beings renewable resources??

Q. Briefly discuss about underdeveloped countries.

Q. To save energy and prevent warming, I use ...................... instead of incandescent bulbs.