What is matter Class 9 Question Answer?

Answer: Anything that occupies space and has mass is called matter. Matter can exist in three physical states—solid, liquid, and gaseous.

Which chapter is most important in science class 9?

CBSE Class 9 Science Exam 2020: Chapter-wise important topics and questions

  • Chapter 1: Matter in Our Surroundings.
  • Chapter 2: Is matter arround us pure.
  • Chapter 3: Atoms and Molecules.
  • Chapter 4: Structure of Atom.
  • Chapter 5: The fundamental unit of life.
  • Chapter 6: Tissues.
  • Chapter 7: Diversity in kiving Organisms.

What is solution in science class 9?

Answer: A solution is a homogeneous mixture of two or more substances. A solution has a solvent and a solute as its components. The component of the solution that dissolves the other component in it (usually the component present in larger amount) is called the solvent.

What is science class 9th?

Class 9 Science consists of Physics, Chemistry, and Biology. It is important for students to understand all the concepts available in these subjects to score well. Through these, students will be able to get solutions for questions that they get stuck in.

What is hot sizzling food?

> Particles of hot sizzling food possess large kinetic energy and diffuse in air rapidly and reach several meters away. Particles of cold food possess less kinetic energy and are not able to reach several meters away. Particles of matter possess kinetic energy and keep moving constantly.

Why do we fall ill?

Infectious diseases are caused by pathogens such as bacteria, viruses, fungi and parasites entering the body through the air we breathe, the food and drink we consume or through openings in the skin, such as cuts. As an example, through cough and sneezing a person can spread the cold virus to another.

Is Class 9 Science hard?

In Class 9, Science can be a challenging subject to learn. Students will have to understand the concepts of physics, chemistry, and biology in depth so that the foundations they have to move onto more complex topics in the future are strong enough.

Why we can smell food from a distance?

When we increase temperature, the particles move with more speed and gain kinetic energy. Hot food has a very high temperature. Thus it spreads to a very large distance. So we can say that we smell hot food from a distance because of diffusion.

Why it is that to smell cold food we have to go close but smell of hot food reaches us several meters away?

The smell of hot sizzling food reaches you several meters away but to take smell from cold food you have to go close because particles of hot sizzling food possess large kinetic energy and diffuse in air rapidly and reach several meters away whereas particles of cold food possess less kinetic energy and are not able to …

What does disease look like?

Note: Disease can be viewed by examining symptoms of disease. The common symptoms of diseases include headache, fever, vomiting etc. Like jaundice can be examined by pale skin. Diarrhoea can be examined by loose motions.