Class 9 Exam  >  Class 9 Videos  >  Matter in our surroundings

Matter in our surroundings Video Lecture - Class 9

FAQs on Matter in our surroundings Video Lecture - Class 9

1. What is matter and how is it defined in the context of our surroundings?
Ans. Matter refers to any substance that occupies space and has mass. In the context of our surroundings, matter can be defined as anything that we can see, feel, or touch, including solid objects, liquids, and gases.
2. What are the three states of matter and how do they differ from each other?
Ans. The three states of matter are solids, liquids, and gases. Solids have a fixed shape and volume, while liquids have a definite volume but can change their shape. Gases, on the other hand, have neither a fixed shape nor a fixed volume and can easily expand to fill the available space.
3. What are the physical properties of matter and how do they help in identifying substances?
Ans. Physical properties of matter include color, odor, density, melting point, boiling point, and conductivity, among others. These properties can help in identifying substances because each substance has a unique combination of physical properties. By analyzing these properties, scientists can determine the composition and nature of a substance.
4. What is the role of energy in changing the state of matter?
Ans. Energy plays a crucial role in changing the state of matter. When energy is added to a substance, its particles gain energy and move faster, resulting in a change of state. For example, when solid ice is heated, the energy causes the particles to vibrate faster, leading to the melting of ice and the formation of liquid water.
5. How can matter be classified based on its composition?
Ans. Matter can be classified into two types based on its composition: pure substances and mixtures. Pure substances are made up of only one type of particle and have a fixed composition. They can further be categorized as elements (composed of only one type of atom) or compounds (composed of two or more different types of atoms). Mixtures, on the other hand, are made up of two or more substances physically combined and can vary in composition. They can be further classified as homogeneous mixtures (uniform composition throughout) or heterogeneous mixtures (non-uniform composition).
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.
10M+ students study on EduRev
Related Searches

Matter in our surroundings Video Lecture - Class 9

,

Important questions

,

Viva Questions

,

past year papers

,

Summary

,

Matter in our surroundings Video Lecture - Class 9

,

Matter in our surroundings Video Lecture - Class 9

,

practice quizzes

,

mock tests for examination

,

Semester Notes

,

ppt

,

MCQs

,

Sample Paper

,

study material

,

Objective type Questions

,

pdf

,

shortcuts and tricks

,

Extra Questions

,

Exam

,

Free

,

video lectures

,

Previous Year Questions with Solutions

;