Natural Resources Test

Result

Natural Resources Test - 40

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

The soil near the surface is usually darker than about one meter down, this is because the top soil:

A
Is richer in calcium and magnesium

B
Contains more organic matter

C
Is wetter than the sub-soil

D
Is drier than the sub-soil

Solution

The uppermost layer of soil is usually darker in colour due to the presence of huge amount of organic matter. Organic matter is composed of roots, dead leaves, insects, small organisms and animals which eventually get degraded to form humus and make the soil fertile. Humus is black in colour due to the large quantity of carbon.
So, the correct option is 'B'.
Question 2
1 / -0

Which of the following chemicals is/are depleting ozone layer?

A
CFC's and compounds of chlorine fume or halogen gas

B
Carbon dioxide and carbon monoxide

C
Hydrofluorocarbons

D
Both A and C
Question 3
1 / -0

The two forms of oxygen found in the atmosphere are:

A
Water and ozone

B
Water and oxygen

C
Ozone and oxygen

D
Water and carbon-dioxide

Solution

A) Correct Option – C
B) Explanation for correct option -
The two forms of oxygen found in the atmosphere are a diatomic molecular form that has a chemical formula as O2 or oxygen, the life-giving gas that we breathe in to survive.
Another is a triatomic molecular form that has a chemical formula O3 called ozone gas, which protects us from harmful UV rays.
Question 4
1 / -0

The best solution to combat greenhouse effect is

A
To use diesel vehicles

B
To stop infra-red from entering the earth

C
Afforestation and grow abundant plants

D
All of the above

Solution

The best solution to combat greenhouse effect is to plant trees. Trees absorb carbon dioxide and give off oxygen. A single tree will absorb approximately one ton of carbon dioxide during its lifetime.
Question 5
1 / -0

Choose the incorrect statement among the following.

A
Natural gas is used as a starting material for the manufacture of a number of chemicals and fertilizers.

B
Over millions of years, the presence of air, high temperature, and low pressure transformed the dead organisms into petroleum.

C
The air, the water and the soil form the non-living or abiotic component of the biosphere.

D
Minerals, coal, petroleum, natural gas, etc. are exhaustible natural resources.

Solution

Petroleum is a fossil fuel that was formed from the remains of ancient marine organisms.
Millions of years ago, algae and plants lived in shallow seas. After dying and sinking to the seafloor, the organic material mixed with other sediments and was buried. Over millions of years under high pressure and high temperature, the remains of these organisms transformed into what we know today as fossil fuels. Coal, natural gas, and petroleum are all fossil fuels that formed under similar conditions.
Today, petroleum is found in vast underground reservoirs where ancient seas were located.
So, option B has an incorrect statement and is the correct answer.
Question 6
1 / -0

World climate is threatened by an increase in the atmospheric concentration of _________.

A
Oxygen

B
Nitrogen

C
Water vapours

D
Carbon dioxide

E
Both C and D

Solution

Carbon dioxide is a major greenhouse gas. Carbon dioxide concentration increases due to various human activities like burning fossil fuels, construction, etc. Apart from this, even water vapour acts as a greenhouse gas and gets added to the atmosphere as the water evaporates from water bodies by evaporation. The greenhouse gases trap the heat inside the earth's atmosphere and thus, help in maintaining the temperature of our planet. However, an increase in their concentration beyond the required amount has led to an overall increase in the earth's temperature and climate change.
Hence, the correct answer is 'E'.
Question 7
1 / -0

The principle green house gases are ____________.

A
Methane

B
Carbon dioxide

C
Chlorofluorocarbon

D
All of these
Solution
Greenhouse gases are gases in Earth’s atmosphere that trap heat. They let sunlight pass through the atmosphere, but they prevent the heat that the sunlight brings from leaving the atmosphere. The main greenhouse gases are:
- Water vapor
- Carbon dioxide
- Methane
- Ozone
- Nitrous oxide
- Chlorofluorocarbons
Question 8
1 / -0

The pollutant emitted by paddy fields is _________.

A
$$CO_2$$

B
$$CH_4$$

C
$$CO$$

D
$$H_2O_2$$

Solution

Anaerobic decomposition of organic material in flooded rice fields produces methane (CH4). Paddy fields account for around 20% of human-related emissions of methane which escapes into the atmosphere and is a potent greenhouse gas.
So, the correct answer is option B.
Question 9
1 / -0

To prevent soil erosion, a farmer plants a hedge across a field. This method works because

A
The hedge prevents the soil from direct impact of rainwater.

B
The roots of plants prevent the soil erosion.

C
The hedge absorbs minerals from the soil, which makes it most compact.

D
None of the above.

Solution

The vetiver grass is grown as a narrow hedge row across the slope of the land that slows down rainfall runoff velocity and filters out soil particles. The vetiver hedges can block the passage of soil. They can keep topsoil on site and, over time, retard most surface erosion. Hedges of this deeply rooted perennial are capable of catching eroded soil and helping to build up terraces that stabilize the site.
Therefore, the correct answer is option B.
Question 10
1 / -0

A lake with an inflow of domestic sewage rich in organic waste may result in

A
An increased production of fishes due to lot of nutrients

B
Death of fishes due to lack of oxygen

C
Drying of the lake very soon due to algal bloom

D
Increased population of aquatic food web organisms
Solution
Correct Option: B
Explanation:

Domestic sewage contains biodegradable organic matter that can be decomposed by bacteria and other micro-organisms and multiply by using these organic substances.
During this process, they consume a lot of oxygen, and as a result, there is a sharp decline in dissolved oxygen downstream from the point of sewage discharge. This causes the mortality of fish and other aquatic creatures.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Natural Resources Test - 40

Result

Natural Resources Test - 40

Score

-

Rank

-

SHARING IS CARING

Question 1

Is richer in calcium and magnesium

Contains more organic matter

Is wetter than the sub-soil

Is drier than the sub-soil

Solution

Question 2

CFC's and compounds of chlorine fume or halogen gas

Carbon dioxide and carbon monoxide

Hydrofluorocarbons

Both A and C

Question 3

Water and ozone

Water and oxygen

Ozone and oxygen

Water and carbon-dioxide

Solution

Question 4

To use diesel vehicles

To stop infra-red from entering the earth

Afforestation and grow abundant plants

All of the above

Solution

Question 5

Natural gas is used as a starting material for the manufacture of a number of chemicals and fertilizers.

Over millions of years, the presence of air, high temperature, and low pressure transformed the dead organisms into petroleum.

The air, the water and the soil form the non-living or abiotic component of the biosphere.

Minerals, coal, petroleum, natural gas, etc. are exhaustible natural resources.

Solution

Question 6

Oxygen

Nitrogen

Water vapours

Carbon dioxide

Both C and D

Solution

Question 7

Methane

Carbon dioxide

Chlorofluorocarbon

All of these

Solution

Question 8

$$CO_2$$

$$CH_4$$

$$CO$$

$$H_2O_2$$

Solution

Question 9

The hedge prevents the soil from direct impact of rainwater.

The roots of plants prevent the soil erosion.

The hedge absorbs minerals from the soil, which makes it most compact.

None of the above.

Solution

Question 10

An increased production of fishes due to lot of nutrients

Death of fishes due to lack of oxygen

Drying of the lake very soon due to algal bloom

Increased population of aquatic food web organisms

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.