Class 8 is considered one of the important classes in a student’s journey towards higher classes. This is the class where students focus on building a base for themselves and prepare themselves for the upcoming grades. Scoring well is important in class 8 as it will improve the self-confidence of students. Learning and revising the course of class 8 is made easy for students to provide a good understanding of each and every concept with the help of solutions. The solutions help students find out answers easily and help them go through the concepts of each and every chapter thoroughly. The notes of every chapter are prepared in a structured format to prepare for exams well and remember the topics without any difficulty.
In the Aakash Lakhmir Singh Solutions for Class 8 Science, the solutions of every chapter are provided in a simple language for the students to understand definitions easily. The solutions are provided in a simple language so that students can clear their doubts easily. The Lakhmir Singh Textbook for Class 8 Science consists of a total of 18 chapters. The solutions cover every important topic and concept. Every concept is explained briefly.
Aakash also provides free Pdf for Lakhmir Singh Solutions for Class 8 Science, which will easily help students access the chapters and their solutions. The solutions are created by subject experts strictly as per the guidelines. The Pdf can be downloaded easily, and students can revise the topics at their convenience.
Chapter 1 Crop Production and Management explains the importance of crops and how crops can be produced through various agricultural practices. A crop is defined as a cultivated plant that is grown on a large scale. It is majorly characterized into two types as per the season - Kharif crop and Rabi crop. The chapter further discusses the primary role of crop growth and production. The topics covered in this chapter are agricultural practices, crop production, soil preparation, manure and fertilizers, irrigation, harvesting, storage, food and animals.
Chapter 2 Micro-Organisms Friends and Foe deals with the terms and definitions of microorganisms. The chapter focuses on the concepts, classification and various roles of microorganisms. It is a vital chapter that helps the students identify how microorganisms are helpful to us and how they can be very lethal. The chapter includes topics that range from industrial, pharmaceutical and domestic beneficial uses of bacteria to the diseases caused by them. The chapter also explains different cycles, such as the nitrogen cycle. The topics covered in this chapter are habitats of microorganisms, harmful microorganisms, food preservation, nitrogen fixation and nitrogen cycle.
Chapter 3 Synthetic Fibres and Plastics discusses synthetic fibres, including nylon, acrylic, polyester and rayon, and their characteristics. The chapter talks about two types of fibres, i.e., Natural fibres and Synthetic fibres. The chapter further talks about plastics, their properties and their effects on the environment. The topics to be covered in this chapter are synthetic fibres, types of synthetic fibres, characteristics of synthetic fibres, plastics and environment.
In Chapter 4, Materials Metals and Non-Metals, students will answer questions about metals and non - metals, differences between them, characteristics and their uses. The chapters describe the physical and chemical properties of metals and non-metals in easy language. The topics to be covered in this chapter are physical properties of metals and non - metals, chemical properties of metals and non - metals, uses of metals and non - metals.
Chapter 5 Coal and Petroleum starts with an introduction and definition of natural resources and their examples. The chapter focuses on exhaustible natural resources, i.e., Coal and Petroleum. These are fossil fuels. The anaerobic decomposition of dead organisms produces fossil fuel. In this chapter, the students will also study alternate resources that can replace fossil fuels. The topics covered in this chapter are coal, coal gas, coal tar, coke, fossil fuel, natural gas, petroleum and petroleum refinery.
Chapter 6 Combustion and Flame discusses combustion, flame and its structure, fuel, effects of burning of fuel etc. Combustion is defined as the chemical reaction in which a substance reacts with oxygen resulting in the production of heat and light. In this chapter, various activities have been demonstrated to make students understand the concepts without difficulty. The topics covered in this chapter are combustion, types of combustions, the role of oxygen in combustion, ignition temperature, inflammable substances, control of fire, definition and different zones of flame, dangerous pollutants, acid rain and its effects.
Conservation of plants and animals is defined as protecting the plant and animal species from destruction. Chapter 7, Conservation of Plants and Animals, focuses on the importance of plants and animals in the ecosystem. The chapter covers deforestation, its causes, ways to conserve wildlife, flora and fauna, biosphere reserve etc. The topics covered in this chapter are deforestation and its causes, consequences of deforestation, conservation of forest and wildlife, biosphere reserve, flora and fauna, endemic species, wildlife sanctuary, national park, red data book, migration, recycling of paper and reforestation.
A cell is defined as the basic unit of life. Chapter 8, Cell Structure and Functions, elaborately explains cell structure and functions with the help of diagrams. The topics covered in this chapter are discovering the cell, the cell, variety in cell number, shape and size in different organisms, cell structure and function, parts of the cell, and comparison of plant and animal cells.
Reproduction is defined as the biological process of producing offspring. Chapter 9 Reproduction in Animals explains the two types of reproduction that are Sexual reproduction and Asexual reproduction. The chapter also focuses on the male reproductive system, female reproductive system and fertilization. The fertilization and development of an embryo are explained well in this chapter. The topics to be covered in this chapter are reproduction, modes of reproduction, fertilization, development of the embryo, viviparous and oviparous animals, and young ones to adults.
Adolescence is defined as the period of transition between childhood and adulthood. Chapter 10, Reaching the Age of Adolescence, discusses topics like adolescence, puberty and the changes that occur during puberty. The important part of the chapter explains the role of hormones in human development and the determination of the sex of the baby. The topics to be covered in this chapter are adolescence and puberty, changes at puberty, secondary sexual characters, the role of hormones in initiating reproductive function, reproductive phase of life in humans, how is the sex of a baby determined, hormones, the role of hormones in completing the life history of insects and frogs, and reproductive health.
Force can be defined as a push or pull acting upon an object. Pressure is defined as the amount of force acting per unit area perpendicularly. Chapter 11 Force and Pressure discusses forces like contact forces and non-contact forces. The chapter further discusses how solids, liquids and gases exert pressure. The topics to be covered in this chapter are forced due to an interaction, exploring forces, and a force can change the state of motion, the force can change the shape of an object, contact forces, non - contact, forces, pressure, the pressure exerted by liquids and gases, and atmospheric pressure.
Friction is defined as the force that acts between two surfaces, and it is the resistance to the motion of one object moving relative to the other. Chapter 12 Friction explains concepts of the force of friction, advantages, disadvantages of friction and factors affecting friction. The topics to be covered in this chapter are the force of friction, factors affecting friction, increasing and reducing friction, wheels reduce friction and fluid friction.
Sound is defined as a form of energy that causes the sensation of hearing. Chapter 13 Sound explains how sound is produced. The chapter also discusses how sound travels. The topics covered in this chapter are sound produced by a vibrating body, sound produced by humans, sound needs a medium of propagation, amplitude, frequency and time period of a vibration, audible and inaudible sounds, noise and music, and noise pollution.
Electricity or electric current is defined as the rate of flow of charged particles in a conductor. Chapter 14 Chemical Effects of Electric Current explains why few liquids are good conductors of electricity while some liquids are poor conductors of electricity. The chapter also discusses the production of electricity concerning the electrical conductivity of the liquid. The topics covered in this chapter are whether liquids conduct electricity, the chemical effects of electric current, and electroplating.
Natural phenomena exist in nature and are caused without human participation. Some examples of natural phenomena are weather, earthquake, thunder, lightning etc. Chapter 15 Some Natural Phenomena deals with disastrous natural phenomena. The chapter focuses on two such phenomena that are earthquake and lightning. The students will also study various ways to reduce such disastrous natural phenomena. The topics to be covered in this chapter are lightning, charging by rubbing, types of charges and their interaction, transfer of charge, the story of lightning, lightning safety and earthquakes.
Light is defined as a form of energy that causes a sense of vision. Chapter 16 Light explains how we can see things around us with the help of light. The chapter discusses reflection and refraction, laws of reflection, different types of reflection and types of mirrors. In this chapter, students will also learn about the human eye with the help of a diagram. The topics to be covered in this chapter are laws of reflection, regular and diffused reflection, multiple images, sunlight - white or coloured, inside our eyes, care of the eyes and visually impaired people.
Chapter 17 Stars and the Solar System discusses the solar system and celestial bodies, also known as heavenly bodies. Celestial bodies are planets, stars and satellites. In this chapter, the students will also learn about the features of various planets. The topics covered in this chapter are the moon, the stars, constellations and the solar system.
Pollution is defined as the presence of contaminants in the environment. Chapter 18, Pollution of Air and Water, discusses the harmful effects of air and water pollution. The chapter then also focuses on the greenhouse effect and ways to minimize the harmful effects caused due to air and water pollutants. The topics to be covered in this chapter are air pollution, a case study about the Taj Mahal, the greenhouse effect and water pollution.
Ques 1. Do the solutions of Lakhmir Singh Class 8 Science cover important points?
Aakash’s Lakhmir Singh Solutions for Class 8 Science covers all the important points and provides comprehensive explanations to every question. Each and every concept is explained in lucid language. Since subject experts make the solutions, these are extremely helpful for students during their examination and even for a quick revision to score good marks. The solutions are drafted so that students will be able to answer questions in different ways as per the question asked.
Ques 2: How are Aakash Lakhmir Singh Solutions for class 8th crucial for the students?
The Aakash Lakhmir Singh solutions are prepared by experts and experienced faculty members who ensure that the quality of answers and the explanation is the best that can be provided. This allows them to get a comprehensive knowledge of the subject and score good marks in the examinations simultaneously.
Ques 3: What is the cost of the Aakash Lakhmir Singh Solutions for Class 8th Science?
The Lakhmir Singh Solutions for Class 8th Science by the Aakash Institute is available on their website for free. Aakash tries its best to provide the students with fewer means with high standard study material.