Grade 8 : Social Science (Exploring Society) - Natural Resources (Set 1) | Concept of Maths

Question 1

If Earth has a total water volume of $V$, and only 2.7% is fresh water, of which 70% is trapped in ice sheets/glaciers, what percentage of $V$ is actually accessible as liquid fresh water for human use?

Accepted Answer

C) Less than 1%

Answer

A) 2.7%

Answer

B) 1.89%

Answer

D) 0.03%

Question 2

A resource is classified as "Ubiquitous" if its spatial distribution function $f(x,y)$ is constant across the globe. Which of the following is a ubiquitous resource?

Accepted Answer

B) The Air we breathe

Answer

A) Copper Ore

Answer

C) Petroleum Reservoirs

Answer

D) Uranium Deposits

Question 3

Sustainable development requires that the rate of resource consumption $R_c$ and the rate of resource regeneration $R_r$ satisfy which inequality to maintain ecological balance?

Accepted Answer

A) $R_c \le R_r$

Answer

B) $R_c > R_r$

Answer

C) $R_c 	imes R_r = 0$

Answer

D) $R_c = R_r^2$

Question 4

In the context of biotic resources, if a population of trees grows at a rate of $P(t) = P_0 e^{rt}$, which factor primarily categorizes them as renewable?

Accepted Answer

D) Their ability to reproduce and regenerate

Answer

A) Their inorganic origin

Answer

B) Their fixed stock $(S)$

Answer

C) Their high market value

Question 5

Soil formation is a slow process where it takes roughly $T = 100$ years to form just 1 cm of soil. If a region loses 5 cm of topsoil due to erosion in 1 year, what is the net deficit in years of natural production?

Accepted Answer

C) 500 years

Answer

A) 5 years

Answer

B) 100 years

Answer

D) 20 years

Question 6

Which of the following is considered a "Human-made Resource"?

Accepted Answer

B) Technology used to extract iron

Answer

A) Iron ore found in the crust

Answer

C) Tropical rainforests

Answer

D) Natural gas deposits

Question 7

Resource value is not always economic. If $V_e$ is economic value and $V_a$ is aesthetic value, a beautiful landscape primarily possesses:

Accepted Answer

D) High $V_a$

Answer

A) Only $V_e$

Answer

B) $V_e > V_a$

Answer

C) Neither $V_e$ nor $V_a$

Question 8

The "Ecological Footprint" measures the demand on Earth's ecosystems. If a country's footprint $F$ exceeds its biocapacity $B$, the country is in:

Accepted Answer

A) Ecological Deficit

Answer

B) Ecological Surplus

Answer

C) Sustainable Equilibrium

Answer

D) Resource Abundance

Question 9

Which conservation method involves planting rows of trees to check wind movement, especially in coastal and dry regions?

Accepted Answer

B) Shelter belts

Answer

A) Mulching

Answer

C) Contour barriers

Answer

D) Intercropping

Question 10

CITES (the Convention on International Trade in Endangered Species) aims to ensure that international trade in specimens of wild animals and plants does not threaten their survival. This is an example of:

Accepted Answer

C) Global conservation effort

Answer

A) Local resource exploitation

Answer

B) Economic trade maximization

Answer

D) Agricultural expansion

Set 1Grade 8 : Social Science (Exploring Society) - Natural Resources