Natural Resources Test

Result

Natural Resources Test - 31

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 greenhouse effect is useful because:

A
it reduces water pollution

B
it increases normal temperature of earth

C
it keeps the temperatures on our planet mild and suitable for living things

D
it reduces greenhouse gases

Solution

The greenhouse effect is useful because trapping some energy keeps the temperatures on our planet mild and suitable for living things. Without its atmosphere and the greenhouse effect, the average temperature at the surface of the Earth would have been very low.
Question 2
1 / -0

Loss of free oxygen can be seen in case of

A
Photosynthesis

B
Respiration

C
Evaporation

D
Condensation

Solution

Oxygen from the atmosphere is taken in by animals for carrying out the process of respiration. Photosynthesis is the process in which autotrophs such as green plants use carbon dioxide and water in presence of sunlight to synthesize nutrients such carbohydrates in the form of glucose and release oxygen. Hence there is loss of oxygen that is returned to the atmosphere by photosynthesis. Thus the correct answer is option A.
Question 3
1 / -0

Conversion of nitrogen-containing organic molecules into nitrates is done by:

A
Decomposers.

B
Producers.

C
Primary consumers.

D
Secondary consumers.

E
Tertiary consumers.

Solution

Once the animal or the plant dies, other bacteria in the soil convert the various compounds of nitrogen back into nitrates and nitrites. A different type of bacteria converts nitrates and nitrites into elemental nitrogen.
These bacteria are known as decomposers.
Thus, the correct answer is option A.
Question 4
1 / -0

How can soil erosion by river floods be controlled?

A
By making canals

B
By pumping water from river

C
By constructing dams across the rivers

D
By letting water flow freely at high speed

Solution

The soil erosion by river floods can be avoided by constructing dams across the rivers. This checks the speed of water and saves soil from erosion. Therefore, the correct answer is option C.
Question 5
1 / -0

Animals obtain all their carbon through:

A
Plants

B
Soil

C
Air

D
Water
Solution
Carbon is bound to oxygen in carbon dioxide gas, and it transfers from the air to plants through photosynthesis.
Animals get carbon from plants in the form of food as plants produce food by carbon dioxide and water in the presence of sunlight.
The carbon cycle plays an important role in the circulation of carbon.
So, the correct answer is option A.
Question 6
1 / -0

What is soil erosion?

A
It is the process by which soil is formed

B
A harmful process that involves the removal and transport of soil by wind and water

C
A natural method of filtering harmful pollutants

D
A process often referred to as the 'greenhouse' effect
Solution
Correct Answer- B
Explanation-
Soil erosion can be defined as the process in which the upper layer of the soil is carried away or displaced.
The carrier which causes soil erosion can be water and air.
Making shelter belts and constructing dams are two ways to prevent soil erosion.
Question 7
1 / -0

Observe the above diagram and answer the following questions.
Can both animals and plants obtain their nitrogen from the atmosphere?

A
Yes, both animals and plants take in nitrogen during respiration.

B
Yes, most of the nitrogen in the cycle is in the atmosphere.

C
No, only plants can take in nitrogen from the atmosphere.

D
No, they must consume it through eating or uptake from the soil.

E
No, they must obtain it through symbiotic relationships.

Solution

Plants take up nitrogen from the soil or obtain it through nitrogen-fixing bacteria in their roots, and animals obtain nitrogen by eating plants.
The nitrogen fixation is the biochemical process by which atmospheric nitrogen is converted into a usable form and absorbed by the plants. Plants are consumed by animal and animal gets nitrogen in the form of protein from plants only.
Thus, the correct answer is option D.
Question 8
1 / -0

Where do nitrogen-fixing bacteria exist in an environment?

A
Stomach of a reptile

B
Lower epidermis of leaves

C
Gills of freshwater fish

D
Large intestine of humans

E
Root systems of plants

Solution

Nitrogen-fixing bacteria exists in the root system of plants so that they can take up the available nitrogen in the soil and carry out its conversion into usable form i.e., ammonia.
Therefore, the correct answer is option E.
Question 9
1 / -0

Why is organic matter (humus) an important part of soil?

A
It helps to improve water infiltration

B
It can break down organic pollutants

C
It converts nitrogen in the air into nitrates used by plants

D
It is rich in nutrients, which is important for fertility

Solution

Humus controls and regulates many soil functions, as well as plant growth. The better the humus count in the soil, the healthier and more productive soil will be. Regardless of the program one uses in farming operations, the higher the humus count, the better the crop is grown yield. Good humus count in the soil will hold soil moisture longer, thus less water is required for crop production. Also, good humus count reduces both water and wind erosion of soil.
Question 10
1 / -0

Greenhouse gases cause:

A
ocean acidification

B
ozone depletion

C
smog pollution

D
all of above

Solution

Increases in the different greenhouse gases have other effects apart from global warming, including ocean acidification (by acid rain), smog pollution (contaminated particles in air) and ozone depletion as well as changes to plant growth and nutrition levels.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Natural Resources Test - 31

Result

Natural Resources Test - 31

Score

-

Rank

-

SHARING IS CARING

Question 1

it reduces water pollution

it increases normal temperature of earth

it keeps the temperatures on our planet mild and suitable for living things

it reduces greenhouse gases

Solution

Question 2

Photosynthesis

Respiration

Evaporation

Condensation

Solution

Question 3

Decomposers.

Producers.

Primary consumers.

Secondary consumers.

Tertiary consumers.

Solution

Question 4

By making canals

By pumping water from river

By constructing dams across the rivers

By letting water flow freely at high speed

Solution

Question 5

Plants

Soil

Air

Water

Solution

Question 6

It is the process by which soil is formed

A harmful process that involves the removal and transport of soil by wind and water

A natural method of filtering harmful pollutants

A process often referred to as the 'greenhouse' effect

Solution

Question 7

Yes, both animals and plants take in nitrogen during respiration.

Yes, most of the nitrogen in the cycle is in the atmosphere.

No, only plants can take in nitrogen from the atmosphere.

No, they must consume it through eating or uptake from the soil.

No, they must obtain it through symbiotic relationships.

Solution

Question 8

Stomach of a reptile

Lower epidermis of leaves

Gills of freshwater fish

Large intestine of humans

Root systems of plants

Solution

Question 9

It helps to improve water infiltration

It can break down organic pollutants

It converts nitrogen in the air into nitrates used by plants

It is rich in nutrients, which is important for fertility

Solution

Question 10

ocean acidification

ozone depletion

smog pollution

all of above

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.