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The NCERT Class 8 Science, Chapter 15 deals with Some Natural Phenomena. In this chapter, you will learn about natural phenomena which you might have come across many times in your real life. In this chapter, you will study the causes and effects of such natural phenomena. You will learn more about lightning and the safety measures to be taken during lightning; the charge when the objects are rubbed against each other. You will learn more about this charge being transferred to other objects, and when transferred to earth, it’s called earthing. You will also learn about earthquakes and the reason behind these earthquakes and understand the do’s and don’ts to be followed during an earthquake whether you are inside or outside.
To know more about NCERT Solutions for Class 8, Science Chapter 15, Some Natural Phenomena, let’s look at the topics and sub-topics of this chapter:
15.1 Lightning
15.2 Charging by Rubbing
15.3 Types of Charges and their Interaction
15.4 Transfer of Charge
15.5 The story of Lightning
15.6 Lightning Safety
15.7 Earthquakes
Section 15.1 – In this section, you will learn about lightning. This section deals with the concept of lightning and how this natural phenomenon is caused. You will learn that in ancient times, people used to be scared of lightning and thought it to be the wrath of Lords. They did not know the reason and hence assumed it as a punishment sent by Lords. You will learn that now we all know that lightning is caused by the accumulation of charges in the clouds. You will also learn about the sparks that the Greeks knew and learn a little on the story of the discovery of sparks seen on clothes.
Section 15.2 – This section deals with Charging by Rubbing. In this section, you will learn about the charge created when brushing a comb on dry hair, a plastic refill is rubbed with polythene. Such objects are called charged objects. This section has activities to understand the concept of charge by rubbing the objects.
Section 15.3 – This section deals with types of charges and their interaction. In this section, you will learn about the different types of charges and the reaction of charges on interaction. You will learn that few charges repel each other and few charges attract. You will also learn about the positive and negative charges, electric current and motion of charges.
Section 15.4 – This section deals with Transfer of Charge. In this section, you will learn about the charges being carried and electroscope which is a device used to test whether an object is carrying a charge or not. You will learn that electrical charge can be transferred from a charged object to another through a metal conductor. You will also learn about concepts like discharge and earthing.
NCERT Class 8 Science, Chapter 15 helps you to understand the concept of Some Natural Phenomena. In this chapter, you will learn about different natural phenomena. You will learn about lightning and the story behind this phenomenon. You will also learn the safety measures to be observed during a bolt of lightning to prevent yourself from it. Besides, you will also learn about the charge created by rubbing objects and how this charge travels from one object to another. This chapter has many simple activities and practical examples which helps you to understand the concepts better and know how these concepts are applied in real life. You will learn about another natural phenomenon called an earthquake. You will learn more about earthquakes and how to measure the intensity of earthquakes and safety measures to be followed during earthquakes to protect yourself from any harm.
Section 15.5 – This section deals with the story of lightning. In this section, you will learn how lightning is caused and the role played by positive and negative charges in causing lightning. You will also learn that electric discharge can occur between two or more clouds or between clouds and the earth.
Section 15.6 – This section deals with Lightning Safety. In this section, you will learn more about lightning safety and the measures to be taken to protect oneself from lightning. You will also study the do’s and don’ts to be observed during lightning when you are inside the home or outside- to avoid going near any electric poles, keeping the electrical appliances unplugged. You will even learn many safety measures that need to be followed during lightning to avoid any harm.
Section 15.7 – This section deals with earthquakes. In this section, you will learn about the minor and major earthquakes. You will study how these earthquakes are caused, the reason and also about the damage an earthquake can cause to life and property. You will also learn that earthquakes can further cause floods, landslides and tsunamis. Besides, you will learn that these tremors are caused by the disturbance deep down inside the uppermost layer of the earth is called the crust. This section also covers detailed information on measuring the intensity of an earthquake on a scale called the Richter scale. You will also learn the safety measures to be followed during an earthquake, and understand how to keep yourself safe during an earthquake.
To know more about the NCERT solutions Class 8 Science, Chapter 15 – Some Natural Phenomena, explore the Exercises and questions below:
https://www.urbanpro.com/assets/new-ui/sharing_job.pngPublished on 2020-02-14 09:56:07 by arunima. Last Modified on 2020-02-14 09:56:07
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