Remembering all the science concepts can be tricky for many. It calls for the need for regular revision. Professional teachers at Vedantu provide you with NCERT solutions class 9 science chapter 14 in a comprehensive format making the revision process quicker and easier for all the students. The class 9 science chapter 14 notes and solutions are designed based on the CBSE format and syllabus. You can also download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.These are concisely curated and are available in PDF format for easy downloads.
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NCERT Solutions for Class 9 Science Chapter 14 - Natural Resources
Chapter 14 Class 9 Science PDF Download
We provide you with NCERT class 9 science chapter 14 solutions in the PDF downloadable version as well. This provides the students with the freedom to study and prepare for their examinations from wherever they want. Alongside, they can also get the hardcopy class 9 natural resources NCERT solutions printed easily.
You can opt for Chapter 14 - Natural Resources NCERT Solutions for Class 9 Science PDF for Upcoming Exams and also You can Find the Solutions of All the Maths Chapters below.
NCERT Class 9 Science Chapter 14 Solutions- Natural Resources
Earth is the only planet where life is found. This life exists because of its resources which include the land, water and air. There are several other resources on which life forms are reliable. Alongside, it also comprises the biotic and abiotic components of life.
14.1 The Breath of Life: Air
The atmosphere is a composition of several gases which include nitrogen, carbon, oxygen, water vapours, etc. Atmosphere covers the earth like a blanket keeping the temperature steady. It also plays a key role in reducing the amount of heat escaping into outer space.
It is caused because of the harmful and toxic elements present in the atmosphere, some of which include pollutants and organic molecules. The causes of air pollution are mostly because of human-made sources which include fuel combustion, smoke, etc. The other natural causes include forest fires, etc. The air pollution has several negative effects on the atmosphere, which include global warming, acid rain, respiratory diseases, etc.
14.2 Water: A Wonder Liquid
Under this section, we talk of water which is among the most important resources. Only 3% of water available on earth is freshwater, the remaining 97% of which is covered by oceans.
It happens when water is contaminated due to excessive pollutants being discharged in the water bodies without adequate treatment. Some of the causes of water pollution include:
It is the process in which the water is lost in the atmosphere from parts of a plant called stomata.
It is the process through which water is lost in the atmosphere in the form of vapours.
14.3 Mineral Riches In The Soil
This section talks about soil, its importance and its components. It is the uppermost layer of the earth’s crust. Soil is formed due to continuous weathering of the mountains. The factors which lead to soil formation include:
Organisms present in the soil
Composition of Soil
Soil is made of organic matter, the basic components of which include water, air, and other inorganic matter as well. There are various types of soils across different regions.
Soil pollution is defined as the addition of harmful substances to the soil, which makes it unproductive. Some of the pollutants include acid rain, industrial wastes, etc.
It is yet another form of soil degradation. The prime agents which lead to soil erosion include rainwater, wind, flowing water, etc. Soil erosion leads to a loss of topsoil, which further reduces the potential for crop production.
14.4 Biogeochemical Cycles
These are defined as the biological cycles in which natural elements are circulated through both biotic and abiotic parts in the ecosystem.
There are mainly three biogeochemical cycles which include:
14.5 Ozone Layer
It is defined as a thin layer which acts as a shield for the earth, protecting it from the injurious radiation of the sun. It mainly consists of high concentrations of ozone.
Exercise 14: 6 Questions
FAQ (Frequently Asked Questions)
1. What is the ozone layer depletion?
According to chapter 14 science class 9, it is defined as the reduction of ozone in the stratosphere. This leads to harmful UV radiations entering the earth’s atmosphere.
2. What is the greenhouse effect?
The greenhouse effect is referred to as the trapping of solar radiation in the earth’s atmosphere. It is a natural phenomenon. Some of the greenhouse gases include ozone, methane, nitrous oxide, water vapour, chlorofluorocarbon, etc.
3. How do forests influence the quality of water, air and soil resources?
Forests play a significant role in influencing the quality of natural resources and do so in multiple ways. Some of these include:
By maintaining the balance between carbon dioxide and oxygen in the atmosphere
Prevention of soil erosion by holding the soil intact with its roots and maintaining its fertility
Restoring water resources. Water evaporates through plants by transpiration and water bodies by evaporation, and condenses to form clouds. These clouds further discharge the water in the form of rainfall.