The air around us forms the …

The air around us forms the atmosphere of the earth. It extends from the ground to about 11 km into space. It gets denser due to gravity as we approach the ground. It has the right amount of pressure and composition to sustain life. The atmosphere above the earth’s surface forms a blanket of gases, protecting us from many harmful radiations that come from outer space. This part of the atmosphere is called the ozone layer. Why is Air Important? Air is a mixture of various gases found in the Earth’s atmosphere. Usually, the air is colourless, odourless and tasteless. It consists of about 78% nitrogen, 21% oxygen, 0.9% argon, 0.04% carbon dioxide, and trace amounts of other gases. Air plays a vital role in the existence of life on earth. The three essential roles of air are as follows: Air for Breathing Air for Combustion Air for Regulating Temperature Air for Breathing  Air contains two essential components: Oxygen and Carbon dioxide, which makes life possible. Oxygen is required by plants and animals to convert the chemical energy stored in food into energy that they can use for various metabolic processes. During the process of respiration, oxygen in the air reacts with molecules from food to produce energy. In the process, carbon dioxide is released. Plants consume carbon dioxide. During the day time or in the presence of sunlight, all green plants convert light energy into chemical energy. In this process, plants convert the carbon dioxide molecule into glucose (food) molecules, and oxygen is released as a byproduct. This process is known as photosynthesis. Thus, we need air to gain energy from food and plants need it to store energy in the form of food. This balance sustains all life on earth. Air for Combustion  What is Combustion? Combustion is a chemical process in which, the fuel combines with oxygen gas to release energy in the form of heat and light. This heat can be used to produce electricity, run our cars and also for cooking. During combustion, oxygen in the atmosphere combines with the carbon atoms to produce carbon dioxide and hydrogen atoms to produce water. In fact, without oxygen, one cannot use these fuels for our daily needs. However, too much oxygen can cause uncontrolled burning and explosions. Even the tiniest spark can set off fires. However, this does not happen because of the presence of nitrogen gas in the atmosphere. Nitrogen does not support combustion and thus prevents the excess reactivity of oxygen. Thus, these two components are essential to ensure that energy from the fuel can be used in a controlled manner. Air for Regulating Temperatures Upon heating, the density of air reduces, and it rises upwards. Similarly, cold air is denser than the hot air which sinks towards the ground. As the hot air rises, it creates a space of low pressure where the cold air rushes in and occupy this space. Winds are formed due to this phenomenon. As the temperature of air increases, it raises up. The colder air from the surroundings enters into it, get heated up, and the cycle repeats. The rising of the hot air transfers its heat into outer space and sinks back down. In this way, heat is transferred from hotter regions to colder regions. This is known as temperature regulation, and the process of transferring heat is called convection. Without the atmosphere, the daytime temperatures on earth would be extremely high and night time temperatures would dip below freezing. Thus, the air (through the greenhouse effect) would act like a blanket, providing a layer of insulation for life on earth. Other natural resources like water, land, rivers, and mountains play a key role in sustaining life on earth by providing a sustainable environment for life. Essentially, life cannot survive without these vital components. To learn more about nature, the air, different components of nature required for sustaining life on earth, register at BYJU’S. Frequently Asked Questions 1. Is breathing combustion? From a biological perspective, breathing resembles combustion, where chemical bonds are broken down and oxygen is used up; which then produces carbon dioxide. 2. Is air needed for life? One of the most integral components of air is oxygen, which is important for all life on earth. However, certain microorganisms can survive without this element. These organisms are called anaerobes. 3. Which gas is essential for burning and breathing? Oxygen is crucial for burning and combustion. It is also important for breathing. 4. What is the scientific name for air? Technically, “air” does not have a scientific name as it is a mixture of substances. Chemical names can be given to “pure” substances such as water (H20) and oxygen (O2). 5. Why is air called the “breath of life?” Air contains oxygen, which is the most important element for all life on earth. More to Read: Biotic And Abiotic Factors    Learn Better through BYJU'S Quiz  Put your understanding of this concept to test by answering a few MCQs. Click ‘Start Quiz’ to begin! Select the correct answer and click on the “Finish” button Check your score and answers at the end of the quiz Start Quiz BIOLOGY Related LinksOzone Layer DefinitionPeristalsis MeaningWhat Is a HeterotrophMonocot StemProkaryotic MeaningWhat Is SpinningEchinodermata ExamplesHuman Anatomy and PhysiologySolanaceae FamilyNervous Tissue Diagram   CBSE Sample Papers CBSE Sample Papers Class 8 Science CBSE Sample Papers Class 9 Science CBSE Sample Papers Class 10 Science CBSE Sample Papers Class 11 Physics CBSE Sample Papers Class 11 Chemistry CBSE Sample Papers Class 11 Biology CBSE Sample Papers Class 12 Physics CBSE Sample Papers Class 12 Chemistry CBSE Sample Papers Class 12 Biology CBSE Previous Year Question Papers CBSE Previous Year Question Papers Class 10 Science CBSE Previous Year Question Papers Class 12 Physics CBSE Previous Year Question Papers Class 12 Chemistry CBSE Previous Year Question Papers Class 12 Biology ICSE Sample Papers ICSE Sample Papers Class 8 Physics ICSE Sample Papers Class 8 Chemistry ICSE Sample Papers Class 8 Biology ICSE Sample Papers Class 9 Physics ICSE Sample Papers Class 9 Chemistry ICSE Sample Papers Class 9 Biology ICSE Sample Papers Class 10 Physics ICSE Sample Papers Class 10 Chemistry ICSE Sample Papers Class 10 Biology ISC Sample Papers Class 11 Physics ISC Sample Papers Class 11 Chemistry ISC Sample Papers Class 11 Biology ISC Sample Papers Class 12 Physics ISC Sample Papers Class 12 Chemistry ISC Sample Papers Class 12 Biology ICSE Previous Year Question Papers ICSE Previous Year Question Papers Class 10 Physics ICSE Previous Year Question Papers Class 10 Chemistry ICSE Previous Year Question Papers Class 10 Maths ISC Previous Year Question Papers class 12 ISC Previous Year Question Papers Class 12 Physics ISC Previous Year Question Papers Class 12 Chemistry ISC Previous Year Question Papers Class 12 Biology Join BYJU'S Learning Program   Grade/Exam Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7 Class 8  Class 9 Class 10 Class 11 Class 12 IAS CAT Bank Exam GATE  Submit Leave a Comment Your Mobile number and Email id will not be published. Required fields are marked * * Send OTP * Post Comment COURSES CBSE ICSE CAT IAS JEE NEET Commerce JEE Main NCERT JEE Advanced CBSE Sample Papers CBSE Question Papers EXAMS CAT Exam GATE Exam IAS Exam UPSC Syllabus UPSC 2021 Bank Exam Government Exams CLASSES Class 1st - 3rd Class 4th - 5th Class 6th - 10th Class 11th - 12th EXAM PREPARATION Free CAT Prep Free IAS Prep Maths Physics Chemistry Biology RESOURCES Blog Videos All Products DSSL COMPANY About Us Contact Us Investors Careers BYJU'S in Media Students Stories - The Learning Tree Faces of BYJU'S – Life at BYJU'S Social Initiative - Education for All BYJU'S APP FAQ Support FREE TEXTBOOK SOLUTIONS NCERT Solutions NCERT Exemplar NCERT Solutions for Class 6 NCERT Solutions for Class 7 NCERT Solutions for Class 8 NCERT Solutions for Class 9 NCERT Solutions for Class 10 NCERT Solutions for Class 11 NCERT Solutions for Class 12 RD Sharma Solutions RS Aggarwal Solutions ICSE Selina Solutions STATE BOARDS Maharashtra Gujarat Tamil Nadu Karnataka Kerala Andhra Pradesh Telangana Uttar Pradesh Bihar Rajasthan Madhya Pradesh West Bengal FOLLOW US   Disclaimer   Privacy Policy   Terms of Services   Sitemap © 2021, BYJU'S. All rights reserved.     BOOK Free Class

Code 417 not added

I need ai code 417 class 9th and 10th book back solutions

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

• Don't post personal information, mobile numbers and other details.
• Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
• Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
• Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

• Don't post personal information, mobile numbers and other details.
• Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
• Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
• Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

We always give commands in qbasic in letter

An assignment was given to Sanjiv and Vibha by their teacher. They were shown the screen shot given below and were asked to answer the following question:

What do you mean by the word wrapping

Define macros in wroter

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

• Don't post personal information, mobile numbers and other details.
• Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
• Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
• Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Chapter 14 lab activity page no 324