case study class 8 science

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CBSE 8th Standard CBSE all question papers, important notes , study materials , Previuous Year questions, Syllabus and exam patterns. Free 8th Standard CBSE all books and syllabus online. Practice Online test for free in QB365 Study Material. Important keywords, Case Study Questions and Solutions. Updates about latest education news and Scholorships in one place.

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Cbse, ncert and icse solution online, class 8 science case study question, case study question class 8 science (cbse / ncert board).

Class 8 Science Case Study Question and Answer: CBSE / NCERT Board Class 8 Science Case Study Question prepared by expert Science Teacher. Students can learn Case Based Question / Paragraph Type Question for NCERT Class 8 Science.

There are total 18 chapter Crop Production and Management, Microorganisms: Friend and Foe

, Synthetic Fibres and Plastics, Materials: Metals and Non-Metals, Coal and Petroleum, Combustion and Flame, Conservation of Plants and Animals, Cell – Structure and Functions, Reproduction in Animals, Reaching the Age of Adolescence, Force and Pressure, Friction, Sound, Chemical Effects of Electric Current, Some Natural Phenomena, Light, Stars and the Solar System, Pollution of Air and Water

For any problem during learning any Case or any doubts please comment us. We are always ready to help You.

CBSE Class 8 Science Case Study Question

• Chapter 1 Crop Production and Management Case Study Question
• Chapter 2 Microorganisms: Friend and Foe Case Study Question
• Chapter 3 Synthetic Fibres and Plastics Case Study Question
• Chapter 4 Materials: Metals and Non-Metals Case Study Question
• Chapter 5 Coal and Petroleum Case Study Question
• Chapter 6 Combustion and Flame Case Study Question
• Chapter 7 Conservation of Plants and Animals Case Study Question
• Chapter 8 Cell – Structure and Functions Case Study Question
• Chapter 9 Reproduction in Animals Case Study Question
• Chapter 10 Reaching the Age of Adolescence Case Study Question
• Chapter 11 Force and Pressure Case Study Question
• Chapter 12 Friction Case Study Question
• Chapter 13 Sound Case Study Question
• Chapter 14 Chemical Effects of Electric Current Case Study Question
• Chapter 15 Some Natural Phenomena Case Study Question
• Chapter 16 Light Case Study Question
• Chapter 17 Stars and the Solar System Case Study Question
• Chapter 18 Pollution of Air and Water Case Study Question

What is Case Study Question?

Ans. At case Study there will one paragraph and on the basis of that concept some question will made. Students have to solve that question.

How many marks will have at case based question?

Most of time 5 questions will made from each case. There will 1 or 2 marks for each question.

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NCERT Solutions For Class 8 Science

If you are searching for the most accurate NCERT Solutions for Class 8 Science then, you are in the right place. Study Path has provided chapter-wise NCERT Solution for Class 8 Science for free in PDF format. All these solutions are updated as per the latest CBSE guidelines by our subject experts. It is essential to understand the concepts given in your NCERT textbook to score excellent marks in the exams. NCERT solutions provided by us help in that. Further, with these solutions beside you, gain your confidence to solve the various problems related to science.

Chapter-wise NCERT Solutions for Class 8 Science

• Chapter 1 Crop Productions and Managements
• Chapter 2 Microorganisms: Friend and Foe
• Chapter 3 Synthetic Fibres and Plastics
• Chapter 4 Materials: Metals And Non-metals
• Chapter 5 Coal and Petroleum
• Chapter 6 Combustion and Flame
• Chapter 7 Conservation of Plants and Animals
• Chapter 8 Cell – Structure and functions
• Chapter 9 Reproduction in Animals
• Chapter 10 Reaching The Age of Adolescence
• Chapter 11 Force and Pressure
• Chapter 12 Friction
• Chapter 13 Sound
• Chapter 14 Chemical Effect of Electric Current
• Chapter 15 Some Natural Phenomena
• Chapter 16 Light
• Chapter 17 Stars and the Solar System
• Chapter 18 Pollution of Air and water

Chapter-wise CBSE Class 8 Science Solutions

Chapter 1: crop production and managements.

In this chapter, you will learn how food is being produced by agricultural activities. Further, this chapter explains the two main categories of crops in India viz., Rabi and Kharif. Moreover, you will learn the basic practices of crop production such as

• Preparation of soil
• Adding manure and fertilizers
• Protecting from weeds

At the end of the chapter, you will also learn about animal husbandry in detail. 

Chapter 2: Microorganisms – Friend and Foe

In this chapter, you will learn about microorganisms and how they play a crucial role in our life. Some examples where microorganisms play a key role are listed below: 

• Making of curd and bread
• Production of medicines
• Increasing soil fertility

In the latter half of the chapter, you will get to know about the harmful microorganisms. Some examples where microorganisms harm us are

• cause different disease
• food poisoning

Further, the chapter explains the different methods of food preservation. The chapter concludes by explaining the nitrogen cycle.

Chapter 3: Synthetic Fibres and Plastics

In this chapter, you will learn about synthetic fibre and its types. Some of the types of synthetic fibre are rayon, nylon, polyester and acrylic. Along with this, the characteristics of synthetic fibres are explained in detail. Then, the chapter also explains about plastics, its properties and its effect in the environment.

Chapter 4: Materials: Metals And Non-metals

This chapter explains the physical and chemical properties of metals and non-metals. Physical properties include malleability, ductility, conductivity etc. Chemical properties include the reaction of metal and non-metal with water, oxygen, acids and bases. In the end, the chapter describes the displacement reactions and the uses of metals and non-metals.

Chapter 5: Coal and Petroleum

In this chapter, you will learn about the natural resources and their classification (exhaustible resources and inexhaustible resources). Moreover, you will learn about coal, petroleum and natural gas are fossil fuels. Further, you will get to know how coke, coal tar and coal gas are formed from coal. The chapter also explains the refining of petroleum. Further, the concept of natural gas is explained.

Chapter 6: Combustion and Flame

In this chapter, you will learn the definition of combustion and its various types. Further, the chapter explains the measures to control the fire. At the latter half of the chapter, the concept of flame and structure of flame is explained. The chapter concludes with the topic of fuel, fuel efficiency and harmful effects of burning the fuel.

Chapter 7: Conservation of Plants and Animals

This chapter explains deforestation and its cause, consequences of deforestation, how to conserve forests and wildlife. Moreover, it also explains about Biosphere reserve, flora and fauna, endemic species, wildlife sanctuary, national park, red data book, migration, recycling of paper. At the end, the chapter talks about reforestation.

Chapter 8: Cell – Structure and Functions

In this chapter, you will get to know that cell structure and its functions. The chapter starts by discussing the discovery of cells. Gradually, it explains the shapes and sizes and a number of cells vary from organism to organism. Further, the different parts of the cell such as cell membrane, cytoplasm, nucleus etc are explained in detail. The chapter concludes with the comparison of plants and animal cell.

Chapter 9: Reproduction in Animals

In this chapter, you will learn about the modes of reproduction i.e sexual and asexual reproduction. In the section of sexual reproduction, you will get to know about male reproductive organs, female reproductive organs, fertilization, development of the embryo, viviparous and oviparous animal. At the end of this chapter, asexual reproduction is explained in detail.

Chapter 10: Reaching the Age of Adolescence

In this chapter, you will learn about the changes that the human body undergoes during adolescence. The chapter starts with the explanation of Adolescence and Puberty. Then, the explain changes during puberty. The chapter further explains the topics of secondary sexual characters, the role of hormones in initiating reproductive function, reproductive phase of life in humans, sex determination, other hormones except for sex hormones, the role of hormones in completing the life history of insects and frogs, reproductive health.

Chapter 11: Force and Pressure

In this chapter, you will know how a force arises from the interaction of two objects. Then it explains that force can be a push or a pull. Moreover, it explains how force can change the shape of an object. Further, you will know about magnetic force, electrostatic force, gravitational force. After that, some topics such as pressure, the pressure exerted by liquids and gases, atmospheric pressure are discussed in detail.

Chapter 12: Friction

This chapter explains about the force of friction, factors affecting friction, how friction can be increased and reduced. At the end of this chapter, the topic of fluid friction is explained.

Chapter 13: Sound

Sound plays an essential role in our life. In this chapter, you will get to know about the sound produced by humans and other vibrating bodies. Further, you will learn about amplitude, time period, frequency of vibration. At the end, the chapter explains to you about the noise pollution and the measure to limit noise pollution.

Chapter 14: Chemical Effects of Electric Current

This chapter explains, why some liquids are a good conductor of electricity and some are a poor conductor of electricity. Further, it explains the chemical effects of electric current and electroplating.

Chapter 15: Some Natural Phenomena

This chapter you will learn about bout lighting and earthquakes. Further, you will know about types of charge and their interactions. Moreover, the chapter explains the steps to minimize the destruction of these natural phenomena.

Chapter 16: Light

In this chapter, you will learn the law of reflection, regular and diffused reflection, multiple reflections. Further, you will know that sunlight is known as white light and it consists of 7 colours. After that, the human eye is explained with a diagram. At the end, the chapter concludes by explaining how we should take care of our eyes and how visually impaired persons can read and write.

Chapter 17: Stars and the Solar System

In this chapter, you will study the celestial objects, the moon, stars and constellations. Moreover, the solar system and the feature of each planet is explained. At the end, some other members of the solar system such as asteroids, comets, meteors and meteorites, artificial satellites are explained.

Chapter 18: Pollution of Air and water

The chapter starts by discussing air pollution and how does air get polluted. Then it describes a case study on the impact of air pollution on Taj Mahal. Further, the concept of the greenhouse effect and methods to reduce air pollution are explained. Further, the chapter discusses the greenhouse effect. After this, the chapter explains water pollution and how water gets polluted. At the end, it explains the method through which water is purified and water pollution can be controlled.

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• CBSE Study Material
• CBSE Important Questions
• Important Questions For Class 8 Science

CBSE Important Questions for Class 8 Science

CBSE Important Questions for Class 8 Science help students face the exams confidently. As the exam nears, they should complete the syllabus and start with the revision. The CBSE Important Questions for Class 8 Science will help them revise the subject quickly. Here, we have compiled the important questions for all the chapters of the CBSE Class 8 Science subject. By solving them, students will understand the types of questions asked in the exam. All types of questions are provided for students’ practice from basic to high level. CBSE Class 8 Science is a fascinating subject and includes interesting topics, thus providing basic knowledge about light, current, force, human beings, etc. Solving these CBSE Class 8 Science Important Questions is the best way to revise the major concepts of the subject.

The subject experts created the questions based exclusively from the exam perspective. Students must start solving them at least 20 days before the annual exam. By doing so, they will be able to analyse their weak areas and work on them. Practising the CBSE Important Questions will improve their performance and overall score in CBSE Class 8 Science exam.

There is a total of 18 chapters in NCERT Class 8 Science book. In the table below, we have provided the Important Questions for CBSE Class 8 Science for all the chapters. We have also included all types of questions, i.e. very short, short and long answers. These questions will cover all the crucial topics and the CBSE Class 8 Science syllabus.

How to Practise the CBSE Class 8 Science Important Questions

• Practise the question of a particular chapter in one go.
• Refrain from looking for the answer while solving the questions.
• Allocate a time duration for solving the questions and try to finish it accordingly.
• After completing all the questions, do a self-evaluation.
• Go through those questions again that could not be solved.

We, at BYJU’S, also provide other study materials such as CBSE Class 8 Science sample papers , notes, exemplars, solutions, etc.

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• CBSE Class 8 Science Sample Paper-1 with Solutions (2023-24)
• Sample Papers

How to Download CBSE Sample Paper-1 for Class 8 Science with Solutions Free PDF

The latest Class 8 Science CBSE sample paper with solved answers, is now available on the website of Vedantu. These sample question papers are available in downloadable PDF format and are the best study material one can rely on for exams. The questions are prepared keeping in mind the syllabus provided by the CBSE board. Practising these Class 8 Science CBSE sample papers, one can self-evaluate their knowledge, time management skills and general improvement. The sample paper of Class 8 Science focuses on the important questions that might appear in examinations, thus preparing for their exams and fetching good marks.

The CBSE sample paper Class 8 Science allows students to update themselves with the question patterns. By solving the sample paper for Class 8 Science , students can familiarise themselves with the questions, thus scoring better marks. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths Students who are looking for the better solutions, can download Class 8 Maths NCERT Solutions to help you to revise the complete syllabus and score more marks in your examinations.

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You can download free PDFs of CBSE Sample Papers for Class 8 Science Mock Paper 1 from the website of Vedantu to help you prepare for your exams.

How to Download CBSE Sample Paper-1 for Class 8 Science with Solutions

Sample paper class 8 science overview.

The question paper is generally divided into four main sections. The questions that appear in the final exam and the sample question paper Class 8 science are of short answer type. This subject demands precise answers along with suitable diagrams. The questions focus mainly on the fundamentals concepts and some simple information. Repeatedly solving the CBSE Class 8 science sample paper will not only increase one’s chance of scoring excellent grades but also enhance their time management skills.

Class 8th Science Sample Paper Benefits

Sample papers for Class 8 science are one of the best resources for the students to prepare for the exams. The paper helps the students to get prior experience before their attempt for the final exam. The CBSE Class 8 science sample paper helps them to test their knowledge from all chapters and get confident about the answers. If any discrepancies occur in the written answers, they can focus more on such questions, so that no mistakes are happening in the final paper. The class 8th science sample paper assists in the self-evaluation as the students can mark themselves for correct and wrong answers. These sample papers for Class 8 science are framed by expert teachers and focus on the recent CBSE trends and patterns.

Apart from all of the other things, the model solutions are also provided for self-assessment of the students. It helps the students to understand the marking scheme and difficulty level of the paper. Students can develop the necessary time management skills by solving the CBSE Class 8 science sample paper. Hence, they’ll be able to solve the question paper in the allocated time duration.

Chapters of CBSE Class 8 Science - At A Glance

Chapter 1: Crop Production and Management

This chapter deals with agricultural practices, basic practices of crop production, preparation of soil, agricultural implements, selection of seeds, adding manure and fertilisers, difference between fertiliser and manure, irrigation, traditional and modern methods of irrigation, protection from weeds, harvesting and storage, food from animals.

Chapter 2: Microorganisms: Friend and Foe

This chapter includes topics like microorganisms and their habitat, microorganisms and us, harmful microorganisms, food preservation, nitrogen fixation and cycle.

Chapter 3: Fibres

This chapter includes topics like synthetic fibres, its types and characteristics, plastics and its choice as materials, plastics and the environment.

Chapter 4: Materials: Metals and Non-Metals

This chapter includes physical and chemical properties and uses of metals and non-metals.

Chapter 5: Coal and Petroleum

This chapter includes topics like coal, petroleum and natural gas.

Chapter 6: Combustion and Flame

This chapter deals with combustion and its types, ways to control fire, flame and its structure, fuel and its efficiency.

Chapter 7: Conservation of Plants and Animals

This chapter includes deforestation, its causes and consequences, 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.

Chapter 8: Cell-Structure and Functions

This chapter deals with the cell, its discovery, structure and function, parts of the cell and the difference between plant and animal cells.

Chapter 9: Reproduction in Animals

This chapter talks about modes of reproduction, sexual and asexual reproduction.

Chapter 10: Reaching the Age of Adolescence

This chapter talks about adolescence and puberty, changes at puberty, secondary sexual characters, role of hormones, reproductive phase of life and reproductive health.

Chapter 11: Force and Pressure

This chapter deals with forces and its types, pressure, atmospheric pressure and pressure exerted by liquids and gases.

Chapter 12: Friction

This chapter is related to friction, its force, factors affecting friction and fluid friction.

Chapter 13: Sound

Chapter sound deals with sound produced by the vibrating body and humans, medium for sound propagation, amplitude, time period, frequency of vibration, audible and inaudible sounds, noise, music and noise pollution.

Chapter 14: Chemical Effects of Electric Current

Important topics included in this chapter are conduction of electricity, chemical effects of electric current and electroplating.

Chapter 15: Some Natural Phenomena

This chapter talks about lightning, charging by rubber, types of charges and their interaction, transfer of charge, lightning and its safety and earthquakes.

Chapter 16: Light

The important topics included in this chapter are laws of reflection, regular and diffused reflection, multiple images, sunlight, eyes and its care and Braille system.

Chapter 17: Stars and The Solar System

This chapter includes knowledge about the moon, stars, constellations and the solar system.

Chapter 18: Pollution of Air and Water

This chapter deals with air pollution, its causes, the Taj Mahal case study, greenhouse effect, water pollution, its causes and its purification.

Sample Questions for Class 8 Science CBSE Board Examinations

1. What are Greenhouse Gases? What are the causes of Global warming?

1. A greenhouse gas absorbs and gives out radiant energy causing the greenhouse effect. Some examples of greenhouse gases in Earth’s atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone. 

2. Global warming is the phenomenon where carbon dioxide and other greenhouse gases and air pollutants collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth’s surface. 

The causes of global warming are as follows:

1. Deforestation is an important reason for global warming. With the cutting down of trees, carbon dioxide absorption has reduced drastically, letting it remain in the air.

2. Industrial activities are also heavily responsible for global warming due to their excess release of greenhouse gases like carbon dioxide and methane into the air.

2.  What are the various ways of controlling water pollution?

Some of the ways of controlling water pollution are as follows:

1. Proper disposal of trash is necessary as many non-degradable items like diapers or plastics end up being flushed down toilets. This chokes up sewage systems and floats in rivers and seas.

2. Proper sewage treatment and maintenance are also vital. This will help limit the number of toxic substances like plastics from ending up in water bodies. 

3. Direct dumping of garbage into the water system has to be stopped. It allows harmful materials to float in these water bodies, polluting them. 

4. Conserving water can also help in avoiding water pollution. Conserving water diminishes the amount of contaminated water that needs to be treated.

5. During cleaning clothes, use a minimum amount of bleaches and detergents to ensure less contaminated water.

3. What is a cataract? How can it be treated?

A cataract is a medical condition whereby the naturally clear lens of the eye gets cloudy. Most cataracts develop over the years. Cataracts can be easily removed with the help of surgery. This is the process of removing the clouded lens and replacing it with a clear artificial lens. The artificial lens, also known as the Intraocular lens, is placed in the same position as the natural lens.

4. What is Iris? Write its functions.

Iris refers to the coloured tissue at the front of the eye that contains the pupil in its centre. Iris helps control the pupil’s size to let in more or less light into the eye as required.

FAQs on CBSE Class 8 Science Sample Paper-1 with Solutions (2023-24)

1. Can solving Class 8th Science sample papers help me pass exams?

The Class 8th sample paper will not only help you pass the exams, but it will also help you secure good marks in it. Professionals set the Science Class 8 sample paper mock paper to better understand the questions and the question patterns. The Science sample paper Class 8 focuses on those questions which have the maximum probability of appearing in the examinations. It is set based on guidelines given by the board. By continuously solving the sample paper of Science Class 8, one can become more confident, reduce stress, and score better marks during the actual examination.

You can avail all the well-researched and good quality chapters, sample papers, syllabus for JEE Main and Advanced and much more from the website of Vedantu and its mobile application available on the play store. 

2. What is Binary Fission? How does it Take Place? Name one Organism in Which Binary Fission Takes Place.

Binary fission is a mode of asexual reproduction wherein the body of the organism separates into two new bodies. It is the primary mode of reproduction in prokaryotic organisms. Binary fission is a process of reproduction in which the genetic material of an organism duplicates which leads to division of the organism into two parts through cytokinesis. Each new organism formed through binary fission receives one copy of DNA. Binary fission is the mode of reproduction exhibited by microorganism, E.coli. 

3. Why are CBSE Sample Paper-1 for Class 8 Science with solutions - free PDF download necessary?

CBSE Class 8 Science Sample Papers are very important for the students because of the following reasons:

The sample papers are prepared in the format of the CBSE examination so that students get accustomed to the format.

Sample papers help students in analyzing the marking scheme.

It helps students judge the level of difficulty of the paper.

It helps students learn time management skills that will help them in their final examination.

It helps students practice the whole syllabus.

4. What are the benefits of CBSE Sample Paper-1 for Class 8 Science with solutions?

There are several benefits of CBSE Class 8 Science Sample Papers. Some of the major benefits are:

It improves the analytical and problem solving skills of Class 8 Students.

It improves the speed and accuracy of Class 8 students for solving examination papers.

It helps students create a strong strategy to solve science papers of standard 8.

It helps students recognize their weak areas so that they can work on them well in advance.

5. What topics are included in the CBSE Sample Paper-1 for Class 8 Science with solutions - free PDF download?

The Class 8 science sample paper is designed as per the syllabus of CBSE given in NCERT textbooks. The major topics included in the sample paper are Crop Production, its Management, Microorganisms, Synthetic Fibres, Plastics, Materials, Metals and Non- Metals, Coal, Petroleum, Combustion, Flame, Conservation of Plants and Animals, Cell-Structure and Functions, Reproduction in Animals, Reaching the age of Adolescence, Force and Pressure, Friction, Sound, Chemical Effects of Electric Current, Some Natural Phenomena, Light, the Solar System, stars, Pollution of Water and Air.

CBSE Class 8 Sample Papers

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Thursday 15 December 2022

Cbse class 8 - physics - sound - case study based question #class8science #sound #physics #eduvictors.

CBSE Class 8 - Physics - Sound - Case Study Based Question

Q1. Read the following and answer the questions given below:

Sound is a form of energy that is produced when air molecules vibrate in a particular pattern called waves. Hence, the sound is a wave. Sound is produced by vibrating objects. Vibration can be described as to and fro motion of an objects. Sound cannot be produced without any vibrations. Sound always requires a medium to travel from the source of its production to the receiver end. Speed of the sound is maximum in solids and minimum in gases.

(i) The audible frequency range of a human ear is:

(a) The range of audible frequency of human ear is 20 to 200 Hz

(b) The range of audible frequency of human ear is 2 Hz to 20 Hz

(c)The range of audible frequency of human ear is 200 to 2000Hz.

(d) The range of audible frequency of human ear is 20 to 20,000Hz

(ii) Ria used a device to measure the loudness of a machine. She recorded her observation as given below. Which of the following represents the correct measurement of loudness?

(iii) Arrange the speed of sounds in solids, liquids and gases in an ascending order:

(a) Gas < Liquid < Solid

(b) Liquid > Gas > Solid

(c) Liquid < Solid < Gas

(d) Solid > Liquid > Gas

(iv) The number of vibrations made by a vibrating body in one second is:

(a) frequency

(c) loudness

1.  (d) The range of audible frequency of human ear is 20 to 20,000Hz

2.  (c) 80 dB

3.  (a) Gas < Liquid < Solid

4.  (a) frequency

Ch 13 - Sound (Q & A) Ch 13 - Sound (MCQs) Ch 13 - Sound (Worksheet) Ch 13 - Sound (Question Bank) Ch 13 - Sound (Worksheet)

CBSE All In One NCERT Based Science Class 8 2022-23 Edition

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CBSE Case Study Questions for Class 6 – 10, 12 for Maths, Science, SST

Cbse case study questions for maths, science, social science.

CBSE Case Study Questions:   Case Study Questions for all Class 1, 2, 4, 5, 6, 7, 8, 9,10, 11 and 12 by Experienced Teachers. We Net Ex. Arranged here Important Case Based Questions for CBSE Board – Maths, Science, Social Science, English.

One must keep in mind to not discover the answers straight forwardly within the given entry but moreover think effectively to determine the answer. Case based questions are either MCQs or Attestation Reason Questions, so for endeavoring such questions you must take after the run the show of end. Case studies capture a range of perspectives, as opposed to the single view of an individual you get with a survey response or interview. This gives the opportunity to gain a greater understanding of the subject in hand and reduces the potential for any bias, by diluting the agenda of a particular individual.

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Due to a little test, the case ponder can conduct an in-depth investigation. – Case ponders make openings for a wealthy surrender of information, and the profundity of investigation can in turn bring tall levels of legitimacy (i.e. giving an exact and comprehensive degree of what the think about is trusting to degree).

There is no maths question

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Question Bank for 8th Class Science

Select chapter, recent question banks, pollution of air and water, practice now, solar system and some natural phenomenon, chemical effects of current and light, force, friction and sound, reproduction and adolescence, cell structure and function, conservation of plants and animals, coal and petroleum, crop production and microorganisms, stars and solar system, some natural phenomena, chemical effects of electric current, force and pressure, reproduction and endocrine system.

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