NCERT Solutions for Class 9 Science

Chapter 1: MATTER IN OUR SURROUNDINGS

In this chapter the main key concepts you will be reading are Definition of matter; solid, liquid and gas; characteristics – shape, volume, density; change of state melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation.

Chapter 2: IS MATTER AROUND US PURE?

In this chapter the main key concepts you will be reading are Elements, compounds and mixtures. Heterogeneous and homogenous mixtures, colloids and suspensions.

Chapter 3: ATOMS AND MOLECULES

In this chapter the main key concepts you will be reading are Atoms and molecules, Law of constant proportions, Atomic and molecular masses. Mole concept: Relationship of mole to mass of the particles and numbers.

Chapter 4: STRUCTURE OF THE ATOM

In this chapter the main key concepts you will be reading are Electrons, protons and neutrons, valency, chemical formula of common compounds. Isotopes and Isobars.

Chapter 5: THE FUNDAMENTAL UNIT OF LIFE

In this chapter the main key concepts you will be reading are Cell as a basic unit of life; prokaryotic and eukaryotic cells, multicellular organisms; cell membrane and cell wall, cell organelles and cell inclusions; chloroplast, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus; nucleus, chromosomes – basic structure, number.

Chapter 6: TISSUES

In this chapter the main key concepts you will be reading are Structure and functions of animal and plant tissues (only four types of tissues in animals; Meristematic and Permanent tissues in plants).

Chapter 7: DIVERSITY IN LIVING ORGANISMS

In this chapter the main key concepts you will be reading are Diversity of plants and animals-basic issues in scientific naming, basis of classification. Hierarchy of categories/groups, Major groups of plants (salient features) (Bacteria, Thallophyta, Bryophyta, Pteridophyta, Gymnosperms and Angiosperms).

Chapter 8: MOTION

In this chapter the main key concepts you will be reading are Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, derivation of equations of motion by graphical method; elementary idea of uniform circular motion.

Chapter 9: FORCE AND LAWS OF MOTION

In this chapter the main key concepts you will be reading are Force and Motion, Newton’s Laws of Motion, Action and Reaction forces, Inertia of a body, Inertia and mass, Momentum, Force and Acceleration. Elementary idea of conservation of Momentum.

Chapter 10: GRAVITATION

In this chapter the main key concepts you will be reading are Gravitation; Universal Law of Gravitation, Force of Gravitation of the earth (gravity), Acceleration due to Gravity; Mass and Weight; Free fall.

Chapter 11: WORK AND ENERGY

In this chapter the main key concepts you will be reading are Work done by a Force, Energy, power; Kinetic and Potential energy; Law of conservation of energy.

Chapter 12: SOUND

In this chapter the main key concepts you will be reading are Nature of sound and its propagation in various media, speed of sound, range of hearing in humans; ultrasound; the reflection of sound; echo and SONAR. Structure of the Human Ear (Auditory aspect only).

Chapter 13: WHY DO WE FALL ILL?

In this chapter the main key concepts you will be reading are Bio-geo chemical cycles in nature: Water, Oxygen, Carbon and Nitrogen.

Chapter 14: NATURAL RESOURCES

In this chapter the main key concepts you will be reading are Air, Water, and Soil. Air for respiration, for combustion, for moderating temperatures; movements of air and its role in bringing rains across India. Air, water and soil pollution (brief introduction). Holes in ozone layer and the probable damages.

Chapter 15: IMPROVEMENT IN FOOD RESOURCES

In this chapter the main key concepts you will be reading are Plant and animal breeding and selection for quality improvement and management; Use of fertilizers and manures; Protection from pests and diseases; Organic farming.

Students should refer to the NCERT Solutions for Class 9 Science provided by our expert teachers. These question answers have been designed based on the latest NCERT textbooks issued for Class 9. It is important for Grade 9 students to go through the solutions provided here to properly understand all concepts. Class 9 Science is an important chapter in Standard 9 from which questions are expected in various class tests and exams. NCERT has given a very good collection of questions for the chapter Class 9 Science which can come in your exams.

Standard 9 students appearing in the upcoming exams should properly go through the questions given at the end of this chapter. Then you should understand the solutions provided by us. We have provided detailed solutions so that you are able to understand Class 9 Science concepts and then take out answers to these questions yourself.

Benefits of Class 9 Science NCERT Solutions:

a) Improves analytical and problem-solving skills for Grade Class 9 Science

b) Improves the students speed and accuracy of solving questions given at the end of this chapter

c) Helps the Class 9 students to understand important questions and learn to answer them properly

d) Supports in identifying weak topics so that students can spend more time to improve and strengthen concepts of different chapters

e) Enhances basic and strong understanding of various topics in Class 9 Science

g) Make yourself aware of the test pattern of upcoming exams