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Alternatively, you can download WinRAR. It is a paid software to open zip files. We have provided the links to download the PDFs of the individual chapters along with the solutions. Just click on the link to check and download the PDF. You can select the chapter from the menu on the left side of the screen. Then click on the download link to download that chapter. We also recommend students start their preparation with NCERT textbooks and then move on to other reference books.
Ans : Students can download the PDF by clicking on the direct links provided in this article. The PDFs are available for free to the students. These are made in a way that abides by CBSE guidelines and exam patterns. Students must make sure that they finish the textbooks thoroughly. Ans : Yes, students can find the chapter-wise links in this article as it is easily accessible.
Stay tuned to embibe. Resend OTP. Free Sign Up. Written By Prince Last Modified Table of Contents. Latest Updates. View all articles. Leveraging Intelligence To Deliver Results. I already have an Embibe account. Enter OTP. Proceed Resend OTP. Chapter 1 of 8th Science, describes the use of Manure and Fertilisers on crops and the methods of replenishing the nutrients of soil through crop rotation. Use of irrigations and their methods, protection from weeds and use of weedicides given properly.
In Class 8 Science Chapter 2 we will learn about microbes. Do you know? Microbes can be classified into four major groups — bacteria, fungi, protozoa and some algae. Viruses are also known as Microscopic Organisms but they reproduce only inside the cells of the host organism. Common ailments like cold, flu and most coughs are caused by viruses.
Serious diseases like polio and chickenpox are also caused by viruses. Harmful microbes cause or spread diseases whereas useful microbes also which are helpful for the environment as well as for the living of Human beings.
In Class 8 Science Chapter 3, the descriptions of man-made fires and their uses are given. We should know about the properties of these synthetic fibres. Plastics, which are divided into Thermoplastic and Thermosetting Plastic , are also useful in daily life activities. We know the good qualities of plastic that light in weight, strong and durable, cheap in cost and a poor conductor of heat and electricity.
Plastic is a non-biodegradable substance, so excess use of plastic may be hazards for the environment.
In Class 8 Science Chapter 4, we will discuss the physical and chemical properties of Metals and Non-metals. We know that metals are malleable means the property of metals by which they can be beaten into thin sheets is called malleability. Similarly, metals are ductile, sonorous and good conductor of heat and electricity.
For the chemical properties of metals, we have to observe the reactivity of various metals towards metals or non-metals. At the end of chapter 4 of Class 8 Science, we will read about the uses of metals and non-metals in daily life. We have to study deeply about Coal, means formation, users and availability everything including Coal Gas, Coal Tar and Coke. Mining and refining of Petroleum is also an interesting topic in Chapter 5 of Grade 8 Science.
Natural Gas — CNG is also an important topic to study for exams. These all are natural resources and limited in quantity. So, we should use natural resources carefully and wisely. In Class 8 Science Chapter 6 we will study about Combustion. Every combustion needs fuel. Do you know that the substance that undergoes combustion is said to be fuel combustible? Combustion of materials needs the oxygen and ignition temperature. The minimum temperature required to burn a substance is known as Ignition temperature.
The substances which have quite a low ignition temperature, they can easily catch fire with a flame. So, these are called inflammable substances. We should be careful about such substances and keep it away from the flame. Sometimes a material suddenly bursts into flames, without the application of any apparent cause, this is called spontaneous combustion.
In Class 8 Science Chapter 7, we will study about deforestation and its causes. Do you know that due to human activities the fertile land gets converted into deserts?
It is called Desertification. As we know that the plants and animals found in a particular area are termed flora and fauna for that area. So, we should preserve our flora and fauna. We should be more careful and protective about Endemic species, which are found exclusively in a particular area. We should know more about Endangered Animals whose numbers are diminishing to a level that they might face extinction.
In Class 8 Science Chapter 8 , we have to study about Cell, its structure and discovery also. There are animals which are divided as per the number of cells present in the body, for example, unicellular or multicellular. Different cells have different functions in the same organism. Chapter 8 of Class 8 Science provides a detailed study about various parts of plant and animal cells.
In sexual reproduction, male and female reproductive organs get involve. The male gamete is known as sperm and the female is known as ova.
After the fertilisation , the zygote is formed with later on converted into an embryo. When, in embryo, all the body parts can be identified, now it is called a foetus.
Budding and fission are common ways to generate the new young one in asexual reproduction. In Class 8 Science Chapter 10 we are going to discuss the period of life, when the body undergoes changes, leading to reproductive maturity, is called adolescence. The period of adolescence may vary from one person to another. At the age of puberty, there may observe the increase of height, change in voice, change in body shape and development of sex organs.
In females, the reproductive phase of life begins at puberty and generally lasts till the age of approximately 45 to 50 years. In Class 8 Science Chapter 11 we are going to know about the terms related to forces and pressure. We know that any push or pull on an object can be treated as a force.
The interaction between two objects results in a force between the two objects. If the forces applied on an object in the same direction, the net force can be obtained by adding one another whereas if the two forces act in the opposite directions on the object, the net force acting can be calculated by subtracting them. The strength of a force is known as the magnitude of the force. A force may bring a change in the state of motion, shape or position of an object. In Class 8 Science Chapter 12 we will learn about the force of friction and the factors which affect the friction.
We know that friction is a necessary evil. It reduces the force but it is useful in most the actions. A moving object would never stop if there were no friction.
The substances which reduce friction are called Lubricants. In some machines, it may not be advisable to use oil as a lubricant. We can reduce friction by putting an air cushion between the moving parts. Rolling of one body over the surface of another body, the resistance to its motion is called Rolling Friction.
The frictional force on an object in a fluid depends on its speed in the fluid, the shape of the object and the nature of the fluid. In Class 8 Science Chapter 13 we have to study about sound and its characteristics. We will know here about vibration and devices which produce vibrations. We can produce a different type of sound with the help of the vocal cord.
All the sound produced by a human is just because of the vibration of vocal cords. Sound always requires a material medium to propagate. Different sounds can be identified by their loudness, shrillness, pitch, etc. Eardrums help us to hear all type of sound. The characteristic of sounds can be known by its frequency, amplitude, wavelength, speed and time periods.
In Class 8 Science Chapter 14 we will try to know about different terms related to electricity. A substance may be termed as a good conductor or bad conductor depending on whether the current can flow through it or not. When we cover a metallic substance with another using electrolysis, it is called electroplating.
It is useful to prevent the metallic substance from corrosion also. We all have seen the lightning and heard the thundering during the rainy season. The chapter starts with the concepts of charging and the types of charges as negative and positive.
When two charged objects come close to each other, the transfer of charges takes place. Using electroscope, we can check whether an object is charged or not.
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