Apurva Institute
1. Matter in Our Surroundings-Evaporation Science Class 9 In English-CBSE Notes
Last Updated : 14 March 2026
Explore science cbse notes for Class 9 Chapter 1. Matter in Our Surroundings Topic Evaporation in English medium for exams preparation.
1. Matter in Our Surroundings-Evaporation Science Class 9 In English-CBSE Notes
Last Updated : 14 March 2026
1. Matter in Our Surroundings-Evaporation Science Class 9 In English-CBSE Notes
1. Matter in Our Surroundings
Evaporation
Terms for changing states:
(A) Fusion: The process of melting, that is, change of solid state into liquid state is known as fusion.
(B) Solidification: The process of changing liquid state into solid is called solidification.
(C) Vaporisation: The process of changing liquid state into gas is called vaporisation.
(D) Condensation: When gases get converted their state into liquid form is known as condensation.
(E) Sublimation: Sublimation is the change of gaseous state directly to solid state without going through liquid state, and vice versa.
- Phenomenon of changing of a liquid into vapours at any temperature below its boiling point is called evaporation.
- Humidity is the amount of water vapour present in air.
atmosphere (atm) is a unit of measuring pressure exerted by a gas. The unit of pressure is Pascal (Pa):
1 atmosphere = 1.01 × 105 Pa. The pressure of air in atmosphere is called atmospheric pressure.
The atmospheric pressure at sea level is 1 atmosphere, and is taken as the normal atmospheric pressure.
Evaporation:
Phenomenon of changing of a liquid into vapours at any temperature below its boiling point is called evaporation.
- Particles of matter are always moving and are never at rest.
- At a given temperature in any gas, liquid or solid, there are particles with different amounts of kinetic energy.
How a liquid get converted into Vapour or get vapourised:
Particles of matter are always moving and are never at rest. At a given temperature in any gas, liquid or solid, there are particles with different amounts of kinetic energy. In the case of liquids, a small fraction of particles at the surface, having higher kinetic energy, is able to break away from the forces of attraction of other particles and gets converted into vapour.
The Factors which influence the rate of Evaporation:
1. An increase of surface area
2. An increase of temperature
3. A decrtrease in humadity
4. An increase in wind speed
1. An increase of surface area: We know that evaporation is a surface
phenomenon. If the surface area is increased, the rate of evaporation
increases. For example, while putting clothes for drying up we spread them out.
2. An increase of temperature: With the increase of temperature, more
number of particles get enough kinetic energy to go into the vapour state.
3. A decrease in humidity: Humidity is the amount of water vapour
present in air. The air around us cannot hold more than a definite amount of
water vapour at a given temperature. If the amount of water in air is already high, the rate of evaporation decreases.
4. An increase in wind speed: It is a common observation that clothes dry faster on a windy day. With the increase in wind speed, the particles of water vapour move away with the wind, decreasing the amount of water vapour in the surrounding.
Understand this main point during evaporation:
In every evaporation the particles of liquid absorb energy from the surrounding to regain the energy lost during evaporation. This absorption of energy from the surroundings make the surroundings cold.
Same fiction can apply for when we pour some acetone (nail polish) or petrol on our palm.
Q:- Why does our palm feel cold when we put some acetone or petrol or perfume on it?
- The particles of acetone or petrol gain energy from your palm or surroundings and get evaporated and this evaporate absorbation of heats from palm causeing the palm to feel cool.
Q: Why are we able to sip hot tea or milk faster from a saucer rather than a cup?
- A saucer increases the surface area for tea or milk cause faster evaporation, this evaporation causing coolness so we able to sip easily.
Q: Why should we wear cotton clothes in summer?
- During summer, we perspire more because of the mechanism of our body which keeps us cool. We know that during evaporation, the particles at the surface of the liquid gain energy from the surroundings or body surface and change into vapour. The heat energy equal to the latent heat of vaporisation is absorbed from the body leaving the body cool. Cotton, being a good absorber of water helps in absorbing the sweat and exposing it to the atmosphere for easy evaporation.
Why Our NCERT Solutions Is Matters For Your Study?
NCERT Solutions are one of the most trusted study resources for students preparing for school exams and board examinations. These solutions help students understand every concept clearly and improve their academic performance. In today’s competitive education system, simply reading the textbook is not enough. Students need proper explanations and accurate answers to understand topics in depth. That is why NCERT Solutions for Classes 6 to 12 are considered essential for effective learning and exam preparation.
On this page, students can find latest NCERT Solutions prepared according to the current CBSE syllabus. These solutions are created by subject experts to help students understand every question in a simple and easy way. With the help of chapter-wise NCERT answers, students can quickly revise important topics and strengthen their concepts. Whether you are preparing for school tests, annual exams, or board exams, these NCERT textbook solutions will guide you step by step.
NCERT Solutions for Class 9 science Chapter 1. Matter in Our Surroundings Topic Evaporation
NCERT Solutions for Class 9 science Chapter 1. Matter in Our Surroundings Topic Evaporation are prepared to help students understand important concepts of the chapter in a simple and clear manner. These solutions are based on the latest CBSE syllabus and follow the official NCERT textbooks. Students who are searching for accurate answers and step-by-step explanations can use these solutions to improve their learning and prepare better for school exams as well as board examinations.
In this section you will find Class 9 science NCERT Solutions covering important questions, explanations and concept-based answers. Each question from the NCERT book is solved carefully so that students can understand how to write answers correctly in examinations. These solutions are also useful for quick revision before tests and assignments.
Why NCERT Solutions Are Important for Class 9 science
NCERT books are considered the most reliable study material for CBSE students. Most examination questions are directly based on NCERT textbooks. Therefore studying NCERT Solutions for Class 9 science helps students understand the exact pattern of questions and the correct method of answering them.
By practicing the questions from Chapter 1. Matter in Our Surroundings, students can strengthen their conceptual knowledge and improve their analytical thinking skills. These solutions also help students identify the most important topics and prepare effectively for school examinations.
About Chapter 1. Matter in Our Surroundings of Class 9 science
Chapter 1. Matter in Our Surroundings is an important part of the Class 9 science syllabus. This chapter explains several key concepts which are essential for understanding the subject in detail. Students often face difficulties while solving textbook questions related to this chapter. That is why NCERT Solutions for Chapter 1. Matter in Our Surroundings are provided to explain every concept in a simple and structured way.
The explanations provided here follow the official NCERT approach so that students can easily relate them to their textbook content. By studying these answers carefully, students can learn how to structure their answers and present them clearly in exams.
Understanding Topic: Evaporation
The topic Evaporation plays a significant role in Class 9 science Chapter 1. Matter in Our Surroundings. Students must understand this topic clearly because it often appears in examinations in the form of short answer or long answer questions. The solutions provided here explain the topic in a step-by-step format so that students can easily grasp the concept.
By studying Evaporation carefully, students can build a strong foundation in the subject and improve their overall academic performance. These solutions also help students revise the topic quickly before examinations.
Benefits of Using NCERT Solutions
- Concept clarity: Each answer explains the concept in simple language.
- Exam preparation: Solutions follow the CBSE exam pattern.
- Quick revision: Students can revise important questions quickly.
- Accurate answers: All solutions are based on the official NCERT textbook.
- Better understanding: Step-by-step explanations improve learning.
Students studying NCERT Solutions for Class 9 science Chapter 1. Matter in Our Surroundings can easily understand the important points of the chapter. These solutions are also useful for completing homework assignments and preparing for tests.
Study NCERT Solutions in english
These solutions are available in english medium so that students can easily understand the concepts in their preferred language. Whether students are studying in Hindi medium or English medium, these solutions help them learn the subject more effectively and prepare confidently for examinations.
By practicing questions from Class 9 science Chapter 1. Matter in Our Surroundings Topic Evaporation, students can strengthen their conceptual understanding and improve their problem-solving skills.
Conclusion
In conclusion, NCERT Solutions for Class 9 science Chapter 1. Matter in Our Surroundings Topic Evaporation provide complete guidance for students who want to understand the chapter thoroughly. These solutions make learning easier, help students revise important concepts and improve their exam performance. Students should practice these answers regularly to build strong fundamentals and achieve better results in their examinations.
1. Matter in Our Surroundings-Evaporation Science Class 9 In English-CBSE Notes
Hindi Medium Students/Teachers/Tutors:
All Chapters science Class 9
Class Wise NCERT Solutions
Students can find NCERT Solutions for Class 6, Class 7, Class 8, Class 9, Class 10, Class 11, and Class 12 on this page. Each class includes detailed solutions for important subjects such as Science, Mathematics, Social Science, English, and Hindi. These solutions are carefully prepared to ensure accuracy and clarity.
- NCERT Solutions for Classes 6 to 8 – Ideal for building strong basic concepts.
- NCERT Solutions for Classes 9 and 10 – Helpful for board exam preparation.
- NCERT Solutions for Classes 11 and 12 – Important for advanced concepts and competitive exams.
1. Matter in Our Surroundings-Evaporation Science Class 9 In English-CBSE Notes Study Materials For Class 6 to 12
Benefits of Studying with NCERT Solutions
Using online NCERT Solutions makes learning easier and more convenient. Students can access the study material anytime and anywhere using their mobile phone, tablet, or computer. This flexibility helps students manage their study time more efficiently and prepare better for exams.
- Easy online access anytime and anywhere.
- Time-saving preparation with ready solutions.
- Better practice with accurate answers.
- Effective revision before exams.
Improve Your Learning with NCERT Solutions
Regular practice with NCERT textbook solutions helps students strengthen their understanding of each subject. These solutions not only help students complete their homework but also improve their analytical and problem-solving skills. By studying chapter-wise answers, students can learn the correct way to write answers in exams and score better marks.
If you want to improve your academic performance, start studying with free NCERT Solutions for all classes. These solutions are designed to make learning simple, clear, and effective for every student. Choose your class, explore the chapters, and begin your preparation with the latest NCERT Solutions today.