Class 9 Exam > Class 9 Videos > Crash Course: Class 9 (Hinglish) > States of Matter
States of Matter Video Lecture | Crash Course: Class 9 (Hinglish)
FAQs on States of Matter Video Lecture - Crash Course: Class 9 (Hinglish)
| 1. What are the three states of matter? |  |
Ans. The three states of matter are solid, liquid, and gas. In solids, particles are closely packed and have a fixed shape and volume. Liquids have particles that are close together but can move around, giving them a fixed volume but not a fixed shape. Gases have particles that are far apart and can move freely, allowing them to take the shape and volume of their container.
| 2. How is the state of matter determined? | |
Ans. The state of matter is determined by the arrangement, motion, and energy of the particles that make up a substance. The particles in a solid are tightly packed and vibrate in fixed positions. In a liquid, the particles are close together but can move past each other. In a gas, the particles are far apart and move freely. The temperature and pressure also play a role in determining the state of matter.
| 3. What is the difference between evaporation and boiling? | |
Ans. Evaporation and boiling are both processes in which a liquid changes into a gas, but they differ in the amount of heat energy required. Evaporation occurs at the surface of a liquid when the particles with higher kinetic energy escape into the air. It takes place at any temperature, even below the boiling point. Boiling, on the other hand, occurs throughout the liquid when the vapor pressure equals the atmospheric pressure. It requires a specific temperature, known as the boiling point, and the addition of heat energy.
| 4. How does melting occur? | |
Ans. Melting is the process in which a solid changes into a liquid. It occurs when heat energy is added to a solid, causing the particles to gain enough energy to overcome the attractive forces holding them in a fixed position. As a result, the particles start moving more freely, and the solid gradually turns into a liquid. The temperature at which melting occurs is known as the melting point.
| 5. What is the difference between a physical change and a chemical change? | |
Ans. A physical change is a change in the physical properties of a substance, such as its shape, size, or state of matter, without altering its chemical composition. Melting, freezing, boiling, and condensation are examples of physical changes. On the other hand, a chemical change involves a transformation of one or more substances into new substances with different chemical properties. Examples of chemical changes include rusting of iron, burning of wood, and digestion of food.
About this Video
|
5.2K Views |
|
4.62/5 Rating |
|
Nov 22, 2024 Last updated |
Video Description: States of Matter for Class 9 2024 is part of Crash Course: Class 9 (Hinglish) preparation.
The notes and questions for States of Matter have been prepared according to the Class 9 exam syllabus.
Information about States of Matter covers all important topics for Class 9 2024 Exam.
Find important definitions, questions, notes, meanings, examples, exercises and tests below for States of Matter.
Introduction of States of Matter in English is available as part of our Crash Course: Class 9 (Hinglish) for Class 9 & States of Matter in
Hindi for Crash Course: Class 9 (Hinglish) course. Download more important topics related with notes, lectures and mock test series for
Class 9 Exam by signing up for free.
Description
Video Lecture & Questions for States of Matter Video Lecture | Crash Course: Class 9 (Hinglish) - Class 9 full syllabus preparation | Free video for Class 9 exam to prepare for Crash Course: Class 9 (Hinglish).
Information about States of Matter
Here you can find the meaning of States of Matter defined & explained in the simplest way possible.
Besides explaining types of States of Matter theory, EduRev gives you an ample number of questions to practice States of Matter tests,
examples and also practice Class 9 tests.
|
Explore Courses for Class 9 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Free
,Objective type Questions
,Sample Paper
,mock tests for examination
,shortcuts and tricks
,States of Matter Video Lecture | Crash Course: Class 9 (Hinglish)
,Semester Notes
,States of Matter Video Lecture | Crash Course: Class 9 (Hinglish)
,practice quizzes
,Summary
,video lectures
,ppt
,Exam
,Previous Year Questions with Solutions
,Extra Questions
,MCQs
,States of Matter Video Lecture | Crash Course: Class 9 (Hinglish)
,Viva Questions
,Important questions
,study material
,past year papers
;
Study States of Matter on the App
Students of Class 9 can study States of Matter alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the States of Matter,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of States of Matter is prepared as per the latest Class 9 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup