NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena

Edited By Vishal kumar | Updated on Sep 16, 2023 08:44 AM IST

NCERT Solutions Class 8 Science Chapter 15 – Access and Download Free PDF

NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena: Well, solving the homework of the chapter is now an easy breezy thing. Just refer to the solutions of NCERT Class 8 Science chapter 15 Some Natural Phenomena to complete your homework. There are so many natural phenomena, on which we humans have no control. These phenomena cause loss of lives, money, buildings, houses, materials, etc. Through NCERT Class 8 Science chapter 15 Some Natural Phenomena, you will be able to get knowledge about destructive natural processes such as lightning and earthquakes.

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NCERT Solutions Class 8 Science Chapter 15 – Access and Download Free PDF
NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena
NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena: Solved Exercise Questions-
Some Natural Phenomena Class 8 Science Chapter 15-Topics
Key features of Class 8 Science Chapter 15 NCERT Solutions

NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena

You will study about various aspects of these phenomena like how they are caused, what instruments are used to measure the magnitude of these processes and what measures you should take to save yourself from lightning and earthquakes. CBSE NCERT solutions for Class 8 Science chapter 15 Some Natural Phenomena mainly deals with questions related to lightning and earthquakes. There are twelve questions explained in NCERT solutions for Class 8 Science chapter 15 Some Natural Phenomena. To score good marks in the exam NCERT Solutions is an ideal tool.

**As per the CBSE Syllabus for the academic year 2023-24, this chapter has undergone a renumbering and is now designated as Chapter 11.

Free download some natural phenomena class 8 solutions PDF for CBSE exam.

NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena

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NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena: Solved Exercise Questions-

Select the correct option in Questions 1.
Q1 . Which of the following cannot be charged easily by friction?

(a) A plastic scale
(b) A copper rod
(c) An inflated balloon
(d) A woollen cloth.

Answer:

(b) A copper rod cannot be charged easily by friction.

Q2. When a glass rod is rubbed with a piece of silk cloth the rod

(a) and the cloth both acquire positive charge.
(b) becomes positively charged while the cloth has a negative charge.
(c) and the cloth both acquire negative charge.
(d) becomes negatively charged while the cloth has a positive charge.

Answer:

(b) becomes positively charged while the cloth has a negative charge, some electrons from the rod gets transferred to the cloth.

Q3 . Write T against true and F against false in the following statements.

( a ) Like charges attract each other (T/F)
( b ) A charged glass rod attract a charged plastic straw (T/F)
( c ) Lightning conductor cannot protect a building from lightning (T/F)
( d ) Earthquakes can be predicted in advance (T/F)

Answer:

(a) False, like charges, repel each other and unlike charges attract each other.

(b) True, a charged glass rod is positively charged while a charged plastic straw is negatively charged.

(c) False, lightning conductor rod provides an easy route for the transfer of electric charge to the ground hence is used to protect buildings from the effect of lightning.

(d) False, prediction of the earthquake in advance has not been yet invented but we can determine the magnitude of the earthquake.

Q4 . Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.

Answer:

A cracking sound is heard while taking off a sweater during winters because of electric discharge where positive and negative charges meet, releases some energy in the form of streaks of bright light and sound.

Q5 . Explain why a charged body loses its charge if we touch it with our hand.

Answer:

A charged body loses its charge if we touch it with our hand because of earthing. Our body is a good conductor of electricity so, there is charge transfer from the charged body to the earth.

Q6 . Name the scale on which the destructive energy of an earthquake is measured. An earthquake measures 3 on this scale. Would it be recorded by a seismograph? Is it likely to cause much damage?

Answer:

The destructive energy of an earthquake is measured on the Richter scale. If an earthquake measures 3 on this scale then it would be recorded by a seismograph and it is not more likely to cause much damage.

Q7 . Suggest three measures to protect ourselves from lightning.

Answer:

Three measures to protect ourselves from lightning are:

(i) We should not use telephone cords, electrical wires and metal pipes instead use mobile phones and cordless phones.

(ii) Bathing should be avoided during thunderstorms to avoid contact with running water.

(iii) If you are outside, then stay far away from tall trees, poles or other metal objects.

Q8 . Explain why a charged balloon is repelled by another charged balloon whereas an uncharged balloon is attracted by another charged balloon?

Answer:

A charged balloon is repelled by another charged balloon as they both have same charges and as we know like charges repel each other, while an uncharged balloon has no charge and is different from the charged balloon hence they attract each other.

Q9 . Describe with the help of a diagram an instrument which can be used to detect a charged body.

Answer:

An electroscope device is used to determine whether an object is carrying charge.

When the metal strips repel each other proves that the body is charged because repulsion is the sure test to detect that a body is charged or not.

Q10 . List three states in India where earthquakes are more likely to strike.

Answer:

Three states in India where earthquakes are more likely to strike are:

(i) Kashmir

(ii) Gujarat

(iii) Assam.

Q11 . Suppose you are outside your home and an earthquake strikes. What precaution would you take to protect yourself?

Answer:

The precaution that we would take to protect ourselves from the earthquake are:

(i) Take shelter under a table and stay there till the shaking stops.

(ii) Find a clear spot, away from buildings, trees, and overhead power lines. Drop to the ground.

(iii) If you are in a car or a bus, do not come out. Ask the driver to drive slowly to a clear spot. Do not come out until the tremors stop.

Q12 . The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.

Answer:

No, carrying an umbrella is not at all a good idea during thunderstorms. Wide objects like umbrella are more prone to get stuck by lightning.

Experts from Careers360 have created class 8th science chapter 15 question answer. The solution includes 12 questions, which are a mix of True/False, MCQ, and short answer questions. The language used in the solution is easy to understand and the steps are explained in a step-by-step manner. Students can download the PDF version of the solution and use it according to their convenience.

Lightning occurs due to the accumulation of electric charges in the clouds. Since lightning is due to electric discharge, understanding of basics of charge transfer is important. The concept of charge transfer is explained in NCERT grade 8 chapter 15. There are two types of charges i.e. positive charge and negative charge. The like charges repel each other whereas unlike charges attract each other. To make you understand about properties of charges and transfer of charges, there are simple activities mentioned in NCERT for Class 8 Science chapter 15 Some Natural Phenomena. And also there are questions based on the concept of charge transfer discussed in NCERT Solutions for Class 8.

Earthquake refers to sudden trembling in Earth’s surface caused due to disturbances deep down in the core of Earth. The major reason for the earthquake is the movement of tectonic plates. Now, what are tectonic plates and how their movement causes earthquake will be studied in the chapter some natural phenomena. This chapter also has details about how we can protect ourselves during earthquakes. Solutions of NCERT Class 8 Science chapter 15 Some Natural Phenomena helps to understand the concepts studied in the chapter. Understanding of this chapter is not only important for exam purpose but it has real practical importance also. Thus, learning this chapter will be an experience.

NCERT Solutions For Class 8 Science- Chapter-Wise

Apart from class 8 science chapter 15 question answer chapter-wise solutions for whole class 8 science chapters are given below:

Chapter 1	Crop Production and Management
Chapter 2	Microorganisms Friend and Foe In Microorganisms
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 Effects 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

NCERT Solutions For Class 8: Subject-Wise

Some Natural Phenomena Class 8 NCERT Solutions: Important Formulas and Points

Lightning

Lightning is caused by the accumulation of positive and negative charges in clouds.
Lightning conductors are used to protect buildings from lightning strikes.
Safety precautions during a thunderstorm include seeking shelter in a safe place, away from tall objects.

1694833551043

Protection Against Lightning

Lightning conductors are installed on buildings to protect against lightning strikes.
During a thunderstorm, it's advised to stay indoors and away from open areas.

Earthing

Earthing is the process of transferring excess electric charges from a charged object to the Earth, ensuring safety by preventing electrical hazards. It is commonly used in electrical systems to prevent shocks and fires and is essential in lightning protection for tall structures.

1694833584793

Earthquakes

Earthquakes are caused by the movement of Earth's plates along fault lines.
The Richter scale is used to measure the magnitude of earthquakes.
Major earthquakes can cause significant damage to life and property.

Protection Against Earthquakes

Buildings in seismic zones should be designed to withstand earthquakes.
Precautions include using lightweight construction materials, securing heavy objects, and having fire-fighting equipment.

Some Natural Phenomena Class 8 Science Chapter 15-Topics

Topics for some natural phenomena class 8 solutions are given below:

These topics are as follows:
Lightning
Charging by Rubbing
Types of Charges and Their Interaction
Transfer of Charge
The Story of Lightning
Lightning Safety
Earthquakes

Importance of NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena:

Once you have gone through this basic introduction of lightning and earthquakes, you can attempt solving the NCERT exercise Class 8 Science chapter 15 Some Natural Phenomena. The NCERT exercise includes simple questions directly from the NCERT science chapter 15. Learning the CBSE NCERT solutions for Class 8 Science Chapter 15 Some Natural Phenomena helps to score well in exams.

Key features of Class 8 Science Chapter 15 NCERT Solutions

Comprehensive Coverage: These class 8 science ch 15 question answer cover all the important topics related to "Some Natural Phenomena" in the Class 8 curriculum.
Concept Clarity: The class 8 science chapter 15 question answer provide clear and concise explanations to ensure students understand the concepts thoroughly.
Variety of Questions: The solutions include a range of questions covering topics such as lightning, earthquakes, and safety measures during natural disasters.
Practice Questions: Multiple practice questions help students reinforce their understanding and problem-solving skills.
Visual Aids: Diagrams and illustrations are included where relevant to enhance understanding.
Safety Measures: The class 8 some natural phenomena ncert solutions emphasize safety measures and precautions to be taken during natural disasters.
Free Access: These some natural phenomena class 8 questions and answers are freely accessible, making them available to all students for study and revision.

These features make science chapter 15 class 8 a valuable resource for students, facilitating their understanding of the subject and preparation for exams

Also Check NCERT Books and NCERT Syllabus here:

Also Read

NCERT Syllabus for Class 8 2024-25 - Download All Subjects PDF

NCERT Solutions for Class 8 Science Chapter 11 Force and Pressure

NCERT Solutions for Class 8 Science Chapter 10 Reaching The age of adolescence

NCERT Solutions for Class 8 Science Chapter 9 Reproduction in Animals

NCERT Solutions for Class 8 Science Chapter 7 Conservation of Plants and Animals

NCERT Solutions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics

NCERT Solutions for Class 8 Science Chapter 2 Microorganisms Friend and Foe

NCERT Books for Class 8 English 2024 - Download PDF

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