Subject Science (Class 8th)
Chapter 18 Pollution of Air & Water (Punjabi Medium)
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प्रिय छात्रों, यह प्रश्नोत्तरी अभ्यास के लिए है। हम इस साइट पर हर हफ्ते ऐसे प्रश्नोत्तरी अपलोड करते हैं। जिन छात्रों को इन प्रश्नोत्तरी के बारे में जानकारी चाहिए, वे नीचे दिखाए गए टेलीग्राम चैनल से जुड़ें। शुभकामनाएँ!
Class8 Science Chapter 1 Crop Production and Management
This
chapter explains rural practices related to the creation of yield and their
administration. It includes the presentation of various harvest, their climatic
and nourishing necessities and the preparation of soil for comprehensive
improvement of the crops
Class8 Science Chapter 2 Microorganisms: Friends and Foe
This
chapter manages destructive and valuable kinds of microbes and their
significance in different areas. The places where microorganisms live,
microorganisms and us, harmful microorganisms, food preservation, nitrogen
fixation, and nitrogen cycle are a portion of the primary topics covered in
this chapter.
Class8 Science Chapter 3 Synthetic Fibres and Plastic
This
chapter manages artificial texture and plastic that is utilized for an
assortment of purpose. Kind of synthetic fibres, characteristics of synthetic fibres,
plastics, plastic as materials of choice and plastic and the environment are a
portion of the fundamental’s points of this chapter.
Class8 Science Chapter 4 Materials: Metals and Non-metals
This
chapter explains the world of metals, non-metals, their properties, and
employment. This section will assist the students with classifying the
components into metals and non-metals based on their properties. Physical
properties of metals and non-metals, chemical properties of metals and
non-metals, use of metals and non-metals are a portion of the vital topics
talked about in this chapter.
Class8 Science Chapter 5 Coal and Petroleum
Coal and
petroleum manage the two most imperative fuels ever found by humankind. The
chapter additionally explains natural gas and how the characteristics assets
are getting depleted because of huge and uncontrolled usage.
Class8 Science Chapter 6 Combustion and Flame
In this
chapter, you will learn about different sorts of fuels are utilized for a
different purpose at home, in industry and for running autos. Powers like cow
dung, wood, coal, charcoal, petroleum, diesel, packed gaseous petrol (CNG) and
so on are known to the students. In combustion and flame, the chemical
procedure of burning and the sorts of flames created amid this procedure are
considered in detail.
Class8 Science Chapter 7 Conservation of Plants and Animals
Conservation
of plants and animals is a critical subject of science. This part will push the
students to not just to understand the human exercise that negatively affects
the nature’s abundance yet in addition to manners by which they can ensure the
fauna and flora of the ecosystem.
Class8 Science Chapter 8 Cell: Structure and Functions
It
explains the inside and out information about the major unit of life -cell. It
enlightens the students regarding the discovery of the cell, its inclination,
properties, and composition
Class8 Science Chapter 9 Reproduction in Animals
It
explains the modes and procedure of reproduction in creatures. It is
fundamental for the continuation of a species. In this chapter, u will figure
out how reproduction happens in animals is talked about in detail.
Class8 Science Chapter 10 Reaching the Age of Adolescence
In this
chapter, the student will find out about changed that happen in the human body
after which an individual ends up fitting for reproduction.in this chapter we
will learn about the human conceptive organs and the role of hormones in the
development of an individual.
Class8 Science Chapter 11 Fore and Pressure
This
chapter will take the students through the brilliant world of force and
pressure. It will push them to build u uphold of the point as well as ace the
ideas that will assist them with performing better.
Class8 Science Chapter 12 Friction
It is an
essential section of physics that manages the backing off or opposition of
movement. Its causes, impacts, applications and other key properties are talked
about in his chapter.
Class8 Science Chapter 13 Sound
Sound
talks about the distinction between music and noise. Noise pollution, its
causes, impacts, and control measures are explained towards the finish off the
chapter. This chapter will strengthen your base for future complex topics.
Class8 Science Chapter 14 Chemical Effects of Electric Current
In this
chapter, we will discover that metals, for example, copper and aluminium
conducts electricity while materials, for example, rubber, plastic, and wood
don’t conduct electricity.
Class8 Science Chapter 15 Some Natural Phenomenon
This
chapter throws light on the wonderful phenomenon of nature, for example,
lightning and earthquake. Causes, impacts, magnitude and properties of
lightning are discussed in this chapter.
Class8 Science Chapter 16 Light
Light
talks about the key properties, impacts, and utilization of light and its
subordinates. This chapter also gives information about regular reflection,
diffused reflection, laws of reflection, etc.
Class8 Science Chapter 17 Stars and Solar System
This
chapter explains about the celestial objects. Position of those objects, their
structure and centrality are portrayed in this chapter. This part also
discusses the moon, periods of the moon its situation in the planetary system
and surface of the moon.
Class8 Science Chapter 18 Pollution of Air and Water
This
chapter addresses the solution for the unsafe wonder of pollution and how might
one add to its decrease in the individual dimension. Air pollution, how does
air get polluted are some of the significant topics discussed in this chapter.
