NCERT Solutions Class 9 Science Chapter 14

NCERT Solutions for Class 9 Science Chapter 14: Natural Resources

Science is an interesting subject which becomes complex and challenging for students  to comprehend  from grade nine onwards. The syllabus is vast and the easiest way to get through tests and exams is to memorise the key concepts which unfortunately doesn’t help much in the long run. It’s therefore extremely important to have a clear understanding of the subject to sail smoothly through the exams year after year. Moreover, topics learned from Class 9 onwards will have tremendous application in various entrance exams as well.    Therefore, students need to increase their focus while learning the concepts to build their aptitude.. In addition, students interested in this subject can make a  huge difference  in terms of the learning experience by adding NCERT Solutions in their study schedule. 

Class 9 Science Chapter 14: Natural Resources deals with natural resources which are essential for all life forms on earth.  The main topics in this chapter are: i) Natural Resources, ii)Breath of life: Air,iii) Water: A wonder liquid iv) Mineral Riches in the Soil v)BioGeochemical Cycles vi) Ozone Layer NCERT Solutions for Class 9 Science Chapter 14 covers all the main topics (mentioned above)and sub topics such as role of atmosphere in climate control, air pollution,rain, water pollution, ,water cycles , nitrogen cycle, and greenhouse effect etc. 

NCERT Solutions for Class 9 Science Chapter 14 are prepared by  experienced   subject matter experts who strictly follow the NCERT books and latest CBSE guidelines.. The solutions are developed with the concept-based approach and the exact answering method for internal assessment. For a better score, refer to NCERT Solutions for Class 9. This solution is provided by the NCERT board and provides a well-structured solution that helps to understand and grasp the concepts. NCERT solutions cClass 9 Science chapter 14 are available for the students to refer to with a detailed explanation. 

Extramarks is one of the  leading online learning platforms trusted by lakhs of students in primary and secondary classes. Besides, students can sign up at Extramarks’ website and explore a repository of  study material. The solutions include the  solved questions answers  and exercises for the best preparation for  class assessment, tests and exams. In fact, during exams you won’t need any other help or assistance if you are using Extramarks resource which has solutions for all your queries.

Students can also visit our Extramarks website for the latest updates and related news. In addition, students will also refer to NCERT Solutions Class 10, NCERT Solutions Class 11, and NCERT Solutions Class 12. 

Key Topics Covered In NCERT Solutions for Class 9 Science Chapter 14:

NCERT Solutions for Class 9 Science Chapter 14 question answer explain ambient temperature, water, and energy food. In addition, it illustrates with examples  the resources available on the Earth which are the critical factors for all life forms to exist. Students will learn about the Earth's outer crust's land, water, and air. In addition, they  will study the life of living organisms, cloud formation and various processes involved in soil formation.. 

Some of the key topics featured in NCERT Solutions for Class 9 Science Chapter 14 are: 

1. The Breath of Life: Air

The  atmosphere covers the Earth  like a blanket, and we know that air is a bad  conductor of heat. The atmosphere keeps the Earth's average temperature reasonably steady during the day. The atmosphere  can be heated by the radiation from the land as well as radiation from the water bodies. Upon getting heated, convection currents are set up in the air. 

2. Air Pollution

Air pollution is any physical, chemical, or biological change in  the air. This is caused by the contamination of  air by  harmful gases, dust, and smoke. . It can severely affect plants, animals, and people. The atmosphere contains a certain amount of gases. A decrease or increase in the amount of these gases can be harmful for survival. Global warming is a result of this imbalance in gaseous composition.

3. Water pollution

Water pollution is the contamination of water bodies. Water pollution occurs when industrial and agricultural effluents contaminate water bodies like rivers, lakes, and oceans. All life forms are  affected by water pollution. It can affect the life forms found in water bodies in various ways.  . Therefore, water contamination can have devastating effects on life in the long run..

To understand how water pollution contaminates water bodies, students can refer to our NCERT Solutions for Class 9 Science Chapter 14. 

4. The Nitrogen Cycle

The nitrogen cycle is a biogeochemical reaction in which nitrogen is converted into many forms. It is continuously passed from the atmosphere to soil to organisms and back to the atmosphere. It involves many processes, including nitrogen fixation and denitrification. There are two types of nitrogen gas: organic and inorganic. The organic nitrogen found in living organisms is passed along the food chain through the consumption of other living creatures.

The atmosphere is rich in inorganic forms of nitrogen. Symbiotic bacteria can convert inert nitrogen to usable formats, such as nitrites or nitrates. To maintain balance in an ecosystem, nitrogen undergoes many types of transformation. Further, this process can be extended to other biomes, with the marine nitrogen cycle being the most complex biogeochemical cycle.

Students can refer to NCERT Solutions for Class 9 Science Chapter 14 to get detailed information on the formation of the nitrogen cycle. 

5. The Water Cycle

This describes the constant movement of water above, below, and on the Earth's surface. There are many processes involved in water movement apart from the significant steps. The water cycle involves different stages that  include evaporation, sublimation, condensation, precipitation, infiltration, and runoff. 

6. The Carbon Cycle

Along with the carbon and nitrogen cycles, the oxygen cycle plays a vital role in maintaining life. The oxygen cycle is one biological process that helps carry oxygen levels by moving through three major spheres on the Earth:

  • Atmosphere
  • Lithosphere
  • Biosphere

This biogeochemical cycle explains the movement of oxygen gas in the atmosphere, ecosystem, biosphere, and Lithosphere. The oxygen cycle is interconnected to the carbon cycle. Therefore, the atmosphere and carbon cycle are correlated to each other. Consequently, it affects the global climatic conditions and may also affect the oxygen cycle. 

The atmosphere is the layer that contains gases above the Earth's surface. A biosphere is the sum of all Earth's ecosystems. The outer solid portion present on the Earth's crust is called the Lithosphere. It is the largest source of oxygen.

7. Ozone layer

The standard form of elemental oxygen is a diatomic molecule. In the upper atmosphere, however, a molecule contains three atoms. This would be O3, and it is known as ozone. Ozone, unlike the diatomic molecule oxygen, is poisonous. It is also not stable close to the Earth's surface. It serves an important function where  it is found. It absorbs harmful radiation from the Sun. It prevents harmful radiations from reaching Earth's surface, where they could cause damage to many forms of life.

Further, students can refer to NCERT Solutions for Class 9 Science Chapter 14 to understand the harmful radiation in detail. 

NCERT Solutions for Class 9 Science Chapter 14: Exercise & Solutions

The NCERT Solutions for Class 9 Science Chapter 14 can be accessed on  Extramarks’ website. 

Why do students need to incorporate  NCERT Solutions in their syllabus?

Extramarks is one the  leading online educational learning platforms, and has a repository of their study materials for students which are well-renowned and sought after in the industry. Both teachers and students swear by the study materials which are authentic, and reliable provided by Extramarks. The sole reason being our subject matter experts have researched and  prepared the study materials based on the latest CBSE syllabus and as per the NCERT guidelines. These notes are meticulously prepared, concise, and to the point for  the students to be well prepared and confident ahead of the exams. No wonder students have complete faith and trust in Extramarks.

Students can click on the links below for specific exercise -questions and solutions:

  • Chapter 14: Exercise 14.1 - Examples and Solutions
  • Chapter 14: Exercise 14.2 - Examples and Solutions
  • Chapter 14: Exercise 14.3 - Examples and Solutions

Along with this, students can also refer to other solutions for primary and secondary classes:

  • NCERT Solutions Class 1
  • NCERT Solutions Class 2
  • NCERT Solutions Class 3
  • NCERT Solutions Class 4
  • NCERT Solutions Class 5
  • NCERT Solutions Class 6
  • NCERT Solutions Class 7
  • NCERT Solutions Class 8
  • NCERT Solutions Class 9
  • NCERT Solutions Class 10
  • NCERT Solutions Class 11
  • NCERT Solutions Class 12

NCERT Exemplar for Class 9 Science:

Science is an exciting subject and equally difficult to comprehend. Therefore, solving different questions with an advanced  difficulty level is beneficial. It helps students to remember all the concepts they learned from chapter 14. In addition, it also helps them to gain more confidence when they have the correct understanding of the concepts. . 

The NCERT exemplar covers the essential topics and concepts prescribed in the NCERT curriculum and the CBSE cClass 9 Science syllabus. Each case and concept is explained in easily understandable language.  Many questions  in the annual examination are from the Class 9 Science NCERT books solutions. Even questions are taken from NCERT Solutions for Class 9 Science Chapter 14. Students who have registered themselves on Extramarks' website can enjoy  the benefit of the solutions provided. 

Exemplars are available for the students on our website. Students can get  answers for all questions present in the exercise of each and every chapter and intext and  end-text questions. It will help students crack the annual exam with flying colours. . When students include NCERT Solutions and NCERT Exemplar in their study material, they can be rest assured themselves that nothing remains untouched and every example solution, exercise has been covered in the chapter and hence they are confident of their preparation to ace the exam with excellent results

Key Features of NCERT Solutions for Class 9 Science Chapter 14:

NCERT solutions are recommended for students to use in preparation for the Class 9 Science annual exams. NCERT Solutions for Class 9 Science Chapter 14 assists students in answering different types of long and short questions. . These solutions are written in simple and easy to understand  language and follow a systematic method to help students grasp scientific concepts. Students should refer to these chapter-wise NCERT Solutions for Class 9 Science Chapter 14.

These are the key concepts from NCERT Solutions for Class 9 Science Chapter 14:

  • This book will assist students in revising concepts and providing examples to help them understand better..
  • The NCERT Solutions for Class 9 Science Chapter 14  highlights main  Ideas and concepts  to revise for tests and exams quickly and easily.
  • The solution provides background information and essential information relevant to the chapter. Practising the solution thoroughly makes it easier for students to understand and recall key points in the chapter.
  • NCERT Solutions for Class 9 Science Chapter 14 explanations and examples have been made simple and easy to understand. In addition, each example and explanation is marked with its own set of questions.
  • Students can comprehend the details mentioned in the solutions. As a result, they can understand better and score good marks on the exams. 

Q.1 Why is atmosphere essential for life?

Ans-

Atmosphere plays vital role in the sustenance of life on earth. It is essential for life as:

  1. It helps in maintaining the temperature of earth by acting as a blanket of gases.
  2. It provides all the gases to earth that are necessary for the life on earth.
  3. It contains a protective layers of gases i.e., ozone that prevents UV rays to reach earth.
  4. Winds are generated and rain is regulated as a result of changes that take place in the atmosphere due to heating, and movement of air and water vapour present in it.
  5. It also plays a vital role in water cycle.

Q.2 Why is water essential for life?

Ans-

Water is essential for life due to following reasons:

  1. Water helps in maintaining our body temperature.
  2. All the metabolic activities in our body require water.
  3. In both, plants and animals, water is required for transportation of substances.

Q.3 How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?

Ans-

All the organisms are dependent on soil. Some organisms are directly dependent on soil whereas some are indirectly dependent on soil. For example, plants directly depend on soil, for their growth as they absorb minerals from the soil. Soil also acts as a template where roots anchor and provide support to plants. Herbivore and carnivore are indirectly dependent on soil. Soil provides home to many insects and burrowing animals.

The organisms that live in water are totally not independent on soil as a resource. The aquatic plants require minerals that are dissolved in water for their growth. The minerals are carried to the water bodies through rain water and get dissolved in them. Like land animals, aquatic animals are indirectly dependent on soil. Hence, it would be difficult to imagine an aquatic life without the supply of minerals from soil to water bodies.

Q.4 You have seen weather reports on television and in newspapers. How do you think we are able to predict weather?

Ans-

Weather of a region can be predicted on the basis of the temperature of the region, speed and direction of the flowing wind, air pressure, rainfall, relative humidity by using various tools and instruments. Reports of all these elements are collected and analyzed by the meteorological department before making a weather forecast.

Q.5 We know that many human activities lead to increasing levels of pollution of the air, water bodies, and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollution?

Ans-

Isolating the human activities to specific and limited areas would definitely help in reducing pollution of the air, water bodies, and soil. For example, a farmer is using manure and biological control agents for pest control to avoid soil pollution. On the other hand, a farmer is using fertiliser and insecticides in high amounts in his fields that are adjacent to the fields where manures and biological control agents are utilised. The fertilisers and insecticides would reach the adjacent fields through water channels and rain water and would cause soil pollution in the adjacent filed. But the level of pollution would be low as compared to the situation when both the farmers were using fertilisers and insecticides in their fields. Pollution in one area would easily spread in the adjacent area but to a lesser extent. Hence we can say that by limiting out activities to a specific are, we can reduce pollution level.

Q.6 Write a note on how forests influence the quality of air, soil and water resources.

Ans-

Forests influence the quality of air, soil and water resources in the following ways:

  1. Forests help in maintaining a balance between the level of oxygen and carbon dioxide in the air.
  2. By controlling the speed of wind and water, forests prevent soil erosion.
  3. Forests help in replenishing water resources by maintaining water cycle through transpiration.

For viewing question paper please click here

FAQs (Frequently Asked Questions)
1. What is the strategy for scoring grades in Science using NCERT Solutions Class 9 Science Chapter 14?

In Science, each chapter is crucial because  scoring good grades is not that difficult. You need a good strategy and correct understanding of the concepts to handle any question with ease. What students need for examination purposes is a solution that can help them understand the important points easily and make them revise quickly.This chapter also has a high  weightage.  You may  expect  a few questions in  your final exam from this chapter. It is therefore essential to prepare well.  .

2. Are NCERT Solutions for Class 9 Science Chapter 14 enough for the preparation?

Extramarks offers NCERT solutions by following the CBSE marking scheme. The answers are there in the NCERT Book and written in a student-friendly manner. It is essential to go through  the  NCERT Book first followed by NCERT solutions for further practise.. Students could also refer to other study material  available on the website and enhance their learning for better results.