Lakhmir Singh Solutions For Class 8 Science

Lakhmir Singh Solutions is one of the well-known reference books preferred by students of all classes. The book is based on the syllabus designed by the Central Board Of Secondary Examinations. The concepts covered in this solution book are explained in an effortless manner by Lakhmir Singh and Manjit Kaur. 

Following is the table with the list of chapters that are covered in Lakhmir Singh Solution Class 8 Science:

After completion of all the chapters, students can find questions that test their knowledge about the chapters. There are different levels at which the questions are distributed and they are as follows:

• Very short answer type questions
• Short answer type questions
• Long answer type questions
• Multiple-choice questions
• Higher-order thinking type questions

Chapter 1: Crop Production And Management

Crop production and management is a chapter which introduces students to why crops are important and how to grow and take care of the crops. The crop is defined as the plant that belongs to the same kind and is grown on a large scale. The chapter focuses on different practices that are related to crops growth.

Following is the table explaining the number of questions that are present in Chapter 1:

Chapter 2: Micro-Organisms: Friend And Foe

How can a microorganism be a friend as well as a foe? This question is answered in chapter 2. Other concepts such as classification of microorganisms, food preservation, and different cycles such as nitrogen cycle are covered in this chapter.

Following is the table explaining the number of questions that are present in Chapter 2:

Chapter 3: Synthetic Fibres And Plastics

We all agree that plastics have made our life easy, but we are also aware of the side effects that plastics have when it comes to the environment. Also, the clothes that we wear are classified into two categories and they are:

• Natural fibres
• Synthetic fibres

Other terms such as polymers and their types and uses are explained in chapter 3.

Following is the table explaining the number of questions that are present in Chapter 3:

Chapter 4: Materials: Metals And Non-Metals

Ever wondered what makes iron pillars stand strong and rust-free for all these years and maybe even in coming days? This question is answered in chapter 4. What are metals and non-metals, how are they different from each other, their characteristics, and uses are included in the chapter.

Following is the table explaining the number of questions that are present in Chapter 4:

Chapter 5: Coal And Petroleum

Coal and petroleum are the two examples of exhaustible natural resources. But from where did humans find these resources? Fossil fuels are the sources of these resources. What happens when all the exhaustible natural resources are consumed? How can we reduce the usage of these resources? What are the alternative resources that can replace fossil fuels? These are the questions that are answered along with practice questions.

Following is the table explaining the number of questions that are present in Chapter 5:

Chapter 6: Combustion And Flame

Combustion is defined as the process in which a substance reacts with the oxygen that is present in the atmosphere resulting in heat and light production. What is the chemical reaction that is taking place during combustion and the types of flames that are produced during the combustion is explained?

Following is the table explaining the number of questions that are present in Chapter 6:

Chapter 7: Conservation of Plants And Animals

Conservation of plants and animals is defined as the process of protecting plants and animals from damage. This is one of the prime responsibilities as plants and animals play a vital role in the balance of ecosystems. Understand how to protect the environment in chapter 7.

Following is the table explaining the number of questions that are present in Chapter 7:

Chapter 8: Cell Structure And Functions

We know that a cell is a basic structure in any organism. How does the structure of cells vary in animals and plants? What are the functions of cells and basic parts of cells are explained with the help of relevant examples and diagrams?

Following is the table explaining the number of questions that are present in Chapter 8:

Chapter 9: Reproduction In Animals

The production of a new organism from the existing and from the same species is known as reproduction. Why is reproduction important and how does the offspring is obtained from either a single cell or from multiple cells? What are the different methods of reproduction in animals? Understand these questions in chapter 9.

Following is the table explaining the number of questions that are present in Chapter 9:

Chapter 10: Reaching The Age Adolescence

What is the reason behind a baby growing up into a fully grown man or woman? The answer is hormones. Hormones play different roles in human development and are even responsible for the determination of the sex of the baby. Learn more about hormones in chapter 10.

Following is the table explaining the number of questions that are present in Chapter 10:

Chapter 11: Force And Pressure

Did you know that the air we are surrounded by is continuously exerting pressure on us? Chapter 11 explains how pressure is exerted by solids, liquids, and gases. What is force and its types?

Following is the table explaining the number of questions that are present in Chapter 11:

Chapter 12: Friction

The reason why we walk on the roads without falling is because of friction. Friction is defined as the force which opposes the motion of one object over the other. Friction has its own advantages and disadvantages and finds application in different situations. Also, learn about the types of friction in chapter 12.

Following is the table explaining the number of questions that are present in Chapter 12:

Chapter 13: Sound

Sound is one of the forms of energy. It is the energy that we can hear. Sound plays a very important role in our daily life. With the help of chapter 13, we will be able to understand how sound is produced and how it helps us in communicating.

Following is the table explaining the number of questions that are present in Chapter 13:

Chapter 14: Chemical Effects of Electric Current

Chemical effects of electric current is an explanation on how liquids behave when they are exposed to electricity and understanding the electrical conductivity of various types of liquids. Will the electrical conductivity of liquids help in the production of electricity is something that is covered in this chapter.

Following is the table explaining the number of questions that are present in Chapter 14:

Chapter 15: Some Natural Phenomena

Natural phenomena is something that cannot be controlled by human beings. Nevertheless, there are ways to protect from the destruction that are caused by natural phenomena. Chapter 15 has covered two such natural phenomena and they are earthquakes and lightning.

Following is the table explaining the number of questions that are present in Chapter 15:

Chapter 16: Light

Light is a form of energy and is required to see objects around us. Reflection and refraction of light, types of mirrors and what happens to light when it strikes the different types of mirrors are some of the interesting concepts that are covered in this chapter.

Following is the table explaining the number of questions that are present in Chapter 16:

Chapter 17: Stars And The Solar System

Celestial bodies also known as heavenly bodies are the ones that are present in outer space. This includes all the planets, stars, and satellites. Learn about them in chapter 17 Stars and the Solar System.

Following is the table explaining the number of questions that are present in Chapter 17:

Chapter 18: Pollution of Air And Water

The presence of the undesirable and harmful substance in the environment is known as a pollutant and when the concentration of such substances increases in the environment, it is known as pollution. Chapter 18 explains how air and water get polluted and what are the harmful effects and how to minimize these harmful effects.

Following is the table explaining the number of questions that are present in Chapter 18:

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