Natural Resources & Their Conservation Test

Result

Natural Resources & Their Conservation Test - 5

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Read the statements given below and choose the correct option (F = False, T = True).

(a) Forests influence climate, water cycle and air quality.
(b) In a forest, trees form the uppermost layer, followed by herbs. The shrubs form the lowest layer of vegetation.
(c) The forest keeps on growing and changing and can regenerate.
(d) Forests protect the soil from erosion.

A
a - F, b - F, c - T, d - T

B
a - T, b - T, c - F, d - F

C
a - T, b - F, c - T, d - T

D
a - F, b - T, c - T, d - F

Solution

In a forest, trees form the uppermost layer, followed by shrubs. The herbs form the lowest layer of vegetation. Hence, statement (b) is false.

Question 2

1 / -0

Match the following:

Column I	Column II
(a) Decomposers	(i) Dead plant and animal tissues
(b) Canopy	(ii) Habitats for wild life
(c) Porcupine	(iii) Microorganisms
(d) Humus	(iv) Wild animal
(e) Forest	(v) Branches of tall trees

(a) - (iii); (b) - (v); (c) - (iv); (d) - (i); (e) - (ii)

(a) - (ii); (b) - (v); (c) - (iv); (d) - (i); (e) - (iii)

(a) - (v); (b) - (iii); (c) - (iv); (d) - (i); (e) - (ii)

(a) - (iv); (b) - (v); (c) - (iii); (d) - (i); (e) - (ii)

Solution

Column I	Column II
(a) Decomposers	(iii) Microorganisms
(b) Canopy	(v) Branches of tall trees
(c) Porcupine	(iv) Wild animal
(d) Humus	(i) Dead plant and animal tissues
(e) Forest	(ii) Habitats for wild life

Question 3
1 / -0

Read the statements given below and choose the correct option.

Statement 1: Nothing goes waste in a forest.
Statement 2: Forests provide us wood, gum, medicinal plants and many more things.

A
Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.

B
Both statements 1 and 2 are correct, but statement 2 is not the correct explanation of statement 1.

C
Statement 1 is true and statement 2 is false.

D
Both statements 1 and 2 are false.

Solution

Continuous recycling of nutrients occurs in the forests. For example, if an animal dies, dead animals become food for vultures, crows, jackals and insects. In this way, the nutrients are cycled. So, nothing goes waste in a forest. Forests are a source of numerous useful things.
The two statements are correct individually, but statement 2 does not explain statement 1.
Question 4
1 / -0

Refer to the figure given below:

Choose the incorrect statement from the options given below:

A
A represents topsoil and is soft and porous.

B
B has more humus as compared to A, but less minerals.

C
C is little affected by soil forming processes.

D
D denotes the layer of partially weathered bedrock at the base of the soil profile.

Solution

B horizon or the middle layer has a lesser amount of humus, but more minerals as compared to A horizon. This layer is generally harder and more compact.
Question 5
1 / -0

Read the following statements with reference to soil:

(i) Weathering is a very fast process of soil formation.
(ii) Percolation of water is faster in sandy soils.
(iii) Loamy soil contains only sand and clay.
(iv) Top soil contains the maximum amount of humus.

Which of the above statements are correct?

A
(ii) and (iv)

B
(i) and (iii)

C
(ii) and (iii)

D
(i) and (ii)

Solution

Weathering is a slow process. Loamy soil is a mixture of sand, clay and silt.
Question 6
1 / -0

Read the following statements and give appropriate terms for each of them:

(a) The process of breakdown of rocks by the action of wind, water, sunlight
(b) Removal of topsoil during heavy rains or strong winds
(c) Accumulation of wastes in the soil generated by human activity, which alters the features of soil
(d) The process of movement of water into deeper layers of soil

A
a - Erosion, b - Weathering, c - Soil pollution, d - Percolation

B
a - Weathering, b - Erosion, c - Soil pollution, d - Percolation

C
a - Erosion, b - Soil pollution, c - Percolation, d - Weathering

D
a - Weathering, b - Erosion, c - Percolation, d - Soil pollution

Solution

a. The process of breakdown of rocks by the action of wind, water, sunlight - Weathering
b.Removal of topsoil during heavy rains or strong winds - Erosion
c.Accumulation of wastes in the soil generated by human activity, which alters the features of soil - Soil pollution
d.The process of movement of water into deeper layers of soil - Percolation
Question 7
1 / -0

Refer to the diagram given below:

The experimental set up shown above is used to

A
measure the percolation rate of water

B
measure the absorption of water by soil

C
remove moisture content in the soil

D
remove minerals from the soil

Solution

Soil contains moisture content. The experimental set up is used for the removal of moisture content in soil.
Question 8
1 / -0

Directions For Questions

...view full instructions

Oxygen concentrations of two areas, A and B, were plotted to obtain a bar-graph. Which of the following sentences can be concluded from the above bar graph?

A
Area B is highly forested.

B
Area A is highly forested.

C
Area A is highly industrialised.

D
Area B is densely populated.

Solution

Area A shows high concentration of oxygen and oxygen is given out by plants in the process of photosynthesis. Thus, area A has more trees, which means area A is highly forested.
Question 9
1 / -0

Directions: In this question, two statements are given. Read both the statements and select the correct option accordingly.

Statement 1: Saprophytes play an important role in recycling of nutrients.
Statement 2: Saprophytes feed on living animals.

A
Both statements 1 and 2 are true and statement 2 is the correct explanation for statement 1.

B
Both statements 1 and 2 are true, but statement 2 is not the correct explanation for statement 1.

C
Statement 1 is true, but statement 2 is false.

D
Both statements 1 and 2 are false.

Solution

Statement 1 is true, but statement 2 is false. Saprophytes feed on dead animals and thus, they help in recycling of minerals.
Question 10
1 / -0

Directions For Questions

...view full instructions

Refer to the above diagram and choose the incorrect statement from the following:

A
B represents soils which are good in retaining water.

B
A represents soils that are rich in organic matter and are heavy.

C
C represents soils with high degree of microbial activity.

D
D represents soils that drain water easily.

Solution

C represents soils that are ideal for growing cotton. Cotton grows best in sandy-loamy soil or loamy soil, which has average to very less microbial activity.
Question 11
1 / -0

Observe the following statements about the availability of water on the earth and identify the correct option regarding their accuracy.

I. Nearly 97% of the earth's surface is covered with water.
II. Almost 71% of the available water on earth is saline.
III. All living beings require water for their sustenance.
IV. All the terrestrial and many of the aquatic life forms cannot survive on water from the seas and oceans.

A
x - I, x - II, - III, - IV

B
- I, x - II, x - III, - IV

C
x - I, - II, x - III, x - IV

D
- I, x - II, - III, - IV

Solution

Nearly 70% of the earth's surface is covered with water. Hence, statement I is incorrect.
Almost 97% of the available water on earth is saline. Hence, statement II is incorrect.
Statements III and IV are correct.
Question 12
1 / -0

In the given picture A, B, C and D represent the various sources of water on earth. In context to the relative proportion of water they hold, identify the incorrect statements about A, B, C and D.

I. 'A' represents the water in the oceans and 'B' represents the water in the rivers.
II. 'C' represents the water in the rivers and lakes, and 'D' represents the groundwater.
III. 'B' represents the fresh water and 'D' represents the water in the rivers and lakes.
IV. 'C' represents the groundwater and 'D' represents the water in the rivers and lakes.

A
I and II

B
II and III

C
III and IV

D
II and IV

Solution

Statements I and II are incorrect.
Nearly 97% of the water on earth is in the oceans and 3% is fresh water.
79% of the fresh water is frozen as glaciers, and 20% is present as ground water. 62 % of the remaining 1% is the water in the lakes and rivers.
Therefore, the source of water in the decreasing order of the percentage of water is:
Oceans and Seas > Glaciers > Ground water > water in lakes and rivers.
Hence, it can be assumed that:
'A' represents the water in the oceans and 'B' represents the fresh water on the earth.
'C' represents the groundwater and 'D' represents the water in the rivers and lakes.
Question 13
1 / -0

Read the following passage and select the correct option to fill up the blank spaces.

The __(i)__ of water from surface of the earth to the __(ii)__ and then back to the earth is called the water cycle. As a result of the water cycle, water content of the __(ii)__ is maintained at a constant level. Water vapour is formed as a result of __(iii)__ from the oceans, lakes and seas, __(iv)__ from plants, respiration and combustion of fuels. The water vapour rises up in the atmosphere and comes in contact with cold air. On cooling, it __(v)__ to form tiny droplets of water, which together form clouds.

A
evaporation - (i), condenses - (ii), transpiration - (iii), evaporation - (iv), atmosphere - (v)

B
circulation - (i), atmosphere - (ii), evaporation - (iii), transpiration - (iv), condenses - (v)

C
transpiration - (i), atmosphere - (ii), circulation - (iii), evaporation - (iv), condenses - (v)

D
transpiration - (i), atmosphere - (ii), evaporation - (iii), circulation - (iv), condenses - (v)

Solution

The __(circulation)__ of water from surface of the earth to the __(atmosphere)__ and then back to the earth is called the water cycle. As a result of the water cycle, water content of the __(atmosphere)__ is maintained at a constant level. Water vapour is formed as a result of __(evaporation)__ from the oceans, lakes and seas, __(transpiration)__ from plants, respiration and combustion of fuels. The water vapour rises up in the atmosphere and comes in contact with cold air. On cooling, it __(condenses)__ to form tiny droplets of water, which together form clouds.
Question 14
1 / -0

Analyse the two statements given below and select the correct option.

Statement I: It is easier to install a hand pump in the northern plains, but it takes a heavy drilling machine to install a tube well in the plateaus.
Statement II: Water table is usually higher in the plains but is very low in the plateaus.

A
Both statements I and II are correct and statement II is the correct reason for I.

B
Both statements I and II are correct, but statement II is not the correct reason for I.

C
Statement I is correct, but statement II is incorrect.

D
Both statements I and II are incorrect.

Solution

The water table in plateaus is low and heavy drilling through the hard rock is required to reach it.
The process is relatively easier when done in plains as the level of water is higher.
Hence, both statements I and II are correct and statement II is the correct reason for I.
Question 15
1 / -0

Rainwater and the water from water bodies on Earth`s surface pass through the soil by the process of __X___, which then gets accumulated in the ____Y_____ deep under the ground.

Select the most suitable choices for X and Y.

A
X - infiltration, Y - aquifers

B
X - filtration, Y - wells

C
X - precipitation, Y - rivers

D
X - precipitation, Y - aquifers

Solution

Rainwater and the water from water bodies on Earth`s surface percolates through the soil by the process of infiltration.
The infiltrated water then gets accumulated in the aquifers deep under the ground. There are some layers of impermeable rocks which prevent the water in the aquifer from seeping down further.
Question 16
1 / -0

The roles of scrapers and skimmers in the sedimentation tank, respectively, are

A
to remove the grit and sand, and to remove the sludge

B
to remove the sludge, and to remove the floating waste

C
to remove the floating waste, and to remove the sludge

D
to remove the pathogens, and to remove the suspended impurities

Solution

The sludge that settles at the bottom of the sedimentation tank is removed with the help of scrapers.
The floating impurities are removed with the help of skimmers.
Question 17
1 / -0

Observe the given flow chart and identify P, Q and R.

A
Groundwater - P, Bawaris - Q, Taanka - R

B
Groundwater - P, Taanka - Q, Bawaris - R

C
Taanka - P, Groundwater - Q, Bawaris - R

D
Bawaris - P, Groundwater - Q, Taanka - R

Solution

The rainwater from the terraces and roofs may be directed to the ground through pipes and drains, to charge the ground water.
Hence, 'P' is groundwater.
Q represents bawaris, which are deep wells, open to the surface and have steps to reach the water stored.
R represents taanka, which is a covered well and a traditional rainwater harvesting technique, common to the Thar desert region of Rajasthan.
Question 18
1 / -0

Which of the following is a method to reduce the water loss during irrigation?

A
Bawaris

B
Drip irrigation

C
Channelising water through canals

D
Use of tube wells

Solution

Drip irrigation is a type of micro-irrigation system that has the potential to save water and nutrients by allowing water to drip slowly to the roots of plants, either by spraying from above, or through pipes at the soil surface or buried below the surface and having holes at strategic intervals.
Question 19
1 / -0

Activated sludge contains ____ water.

A
80%

B
60%

C
98%

D
67%

Solution

Clarified water is removed from the tank and the activated sludge that contains 97% to 98% water is left behind.
This is then dried in the sun and used as manure.
Question 20
1 / -0

Study the flow chart given below, in which 'P' and 'Q' are the devices used to separate the insoluble waste from the sedimentation tank and 'R' and 'S' are the products of treatment of sludge by microbes. Identify P, Q, R and S.

A
Biogas- P, Skimmer - Q, Compost - R, Scrapper - S

B
Scrapper - P, Skimmer - Q, Compost - R, Biogas - S

C
Skimmer - P, Scrapper - Q, Compost - R, Biogas - S

D
Scrapper - P, Skimmer - Q, Biogas - R, Compost - S

Solution

P is skimmer, which is used to remove the floatable waste like oil and grease.
Q is scrapper, which helps to remove the solid waste like faecal matter that settles at the bottom of the sedimentation tank.
R is compost, which is obtained by drying the sludge and is used as manure.
S is biogas, which is a domestic fuel obtained by decomposition of the sludge by anaerobic bacteria.