NCERT Solutions for Class 8 Science Chapter 12 Some Natural Phenomena

Edited By Vishal kumar | Updated on Apr 22, 2025 03:57 PM IST

Ever wondered how lightning strikes or why the ground suddenly shakes during an earthquake? Chapter 12 of Class 8 Science, some natural phenomena explains powerful forces of nature. With Careers360 NCERT solutions you will learn how these events affect our lives and how we try to stay safe.

In Chapter 12 of NCERT Class 8 Science Solutions - Some Natural Phenomena, you will learn what causes lightning and earthquakes, how we measure them and how to stay safe during such conditions. The NCERT Solutions explains all 12 questions in simple steps, making it easier to understand and remember. It is a great help for exam preparation and scoring well without stress.

This Story also Contains

NCERT Solutions for Class 8 Science Chapter 12 Some Natural Phenomena
NCERT Solutions for Class 8 Science Chapter 12 Some Natural Phenomena: Solved Exercise Questions-
Some Natural Phenomena Class 8 NCERT Solutions: Important Concepts And Points
Some Natural Phenomena Class 8 Science Chapter 12- Topics
Importance of NCERT Solutions for Class 8 Science Chapter 12 Some Natural Phenomena:
NCERT Chapter-Wise Solutions For Class 8th Science

NCERT Solutions for Class 8 Science Chapter 12 Some Natural Phenomena

NCERT Solutions for Class 8 Science Chapter 12 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 precautions would you take to protect yourself?

Answer:

The precautions 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 12 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 12. 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 12 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 on 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 earthquakes 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 12 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.

Some Natural Phenomena Class 8 NCERT Solutions: Important Concepts 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.

Lightning

Charging by Rubbing
- When two objects are rubbed together, they gain or lose electrons and become electrically charged.
Types of Charges and Their Interaction
- There are two types of charges: Positive (+) and Negative (−).
- Like charges repel, unlike charges attract.
Transfer of Charge
- Charge can be transferred from one object to another by contact or conduction.
The Story of Lightning
- Caused by the accumulation of charges in clouds; when the potential difference becomes large, discharge occurs.
Lightning Safety
- Stay indoors during thunderstorms.
- Avoid using electrical appliances, standing under trees, or touching metal objects.

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.

Earthing

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 12- 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 12 Some Natural Phenomena:

NCERT Solutions for Class 8 Science Chapter 12 Some Natural Phenomena is very important for exams. Once you understand the basics of lightning and earthquakes, these step-by-step solutions help you solve all the exercise questions easily. Careers360 solutions not only make your revision smooth but also boost your confidence to score better in exams.

NCERT Chapter-Wise Solutions For Class 8th Science

The chapter-wise NCERT solutions for all the science chapters are listed here along with their links:

NCERT Solutions for Class 8 Science Chapter 1 Crop Production and Management

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

NCERT Solutions for Class 8 Science Chapter 3 Coal and Petroleum

NCERT Solutions for Class 8 Science Chapter 4 Combustion and Flame

NCERT Solutions for Class 8 Science Chapter 5 Conservation of Plants and Animals

NCERT Solutions for Class 8 Science Chapter 6 Reproduction in Animals

NCERT Solutions for Class 8 Science Chapter 7 Reaching the Age of Adolescence

NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure

NCERT Solutions for Class 8 Science Chapter 9 Friction

NCERT Solutions for Class 8 Science Chapter 10 Sound

NCERT Solutions for Class 8 Science Chapter 11 Chemical Effects of Electric Current

NCERT Solutions for Class 8 Science Chapter 12 Some Natural Phenomena

NCERT Solutions for Class 8 Science Chapter 13 Light

NCERT Solutions For Class 8: Subject-Wise

Also Check NCERT Books and NCERT Syllabus here:

Frequently Asked Questions (FAQs)

1. What are the topics covered in NCERT Class 8 Science chapter 12?

Here are the topics covered in NCERT Class 8 Science chapter 12

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

2. Which instrument used to detect earthquake?

A seismograph instrument is used to detect earthquake

3. How do NCERT Solutions for Class 8 Science Chapter 12 help students with their exam preparation?

NCERT Solutions for Class 8 Science Chapter 12 are prepared by subject matter experts, and they cover all the important topics and concepts in the chapter. The solutions are written in clear and simple language, making it easy for students to understand and learn. By referring to the NCERT solutions, students can get a better understanding of the topics covered in the chapter, and this can help them score better in the exams.

4. What will I gain by learning Chapter 12 of NCERT Solutions for Class 8 Science?

Learning Chapter 12 of NCERT Solutions for Class 8 Science can provide several benefits such as understanding the natural phenomena, gaining knowledge about lightning and how it occurs, understanding the concept of thunderstorms and the safety measures to be taken during such situations. It can also help students learn about earthquakes, its causes, and the methods to stay safe during an earthquake. Overall, learning this chapter can help students understand the natural world and stay prepared to face any such natural calamities.

Also Read

NCERT Solutions for Class 8 Maths Chapter 6 Cubes and Cube Roots

NCERT Solutions for Class 8 Science Chapter 3 Coal and Petroleum

NCERT Solutions for Class 8 Science Chapter 4 Combustion and Flame

NCERT Solutions for Class 8 Maths Chapter 2 Linear Equations in One Variable

NCERT Solutions for Class 8 Science Chapter 13 Light

NCERT Solutions for Class 8 Science Chapter 12 Some Natural Phenomena

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NCERT Syllabus for Class 8 Hindi 2025-26: Download All Chapters PDF Here

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Popular Questions

A block of mass 0.50 kg is moving with a speed of 2.00 ms^-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1) $0.34\; J$	Option 2) $0.16\; J$
Option 3) $1.00\; J$	Option 4) $0.67\; J$

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up ? Fat supplies 3.8×10⁷J of energy per kg which is converted to mechanical energy with a 20% efficiency rate. Take g = 9.8 ms⁻² :

Option 1)

2.45×10⁻³ kg

Option 2)

6.45×10⁻³ kg

Option 3)

9.89×10⁻³ kg

Option 4)

12.89×10⁻³ kg

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1) $2,000 \; J - 5,000\; J$	Option 2) $200 \, \, J - 500 \, \, J$
Option 3) $2\times 10^{5}J-3\times 10^{5}J$	Option 4) $20,000 \, \, J - 50,000 \, \, J$

A particle is projected at 60⁰ to the horizontal with a kinetic energy $K$ . The kinetic energy at the highest point

Option 1) $K/2\,$	Option 2) $\; K\;$
Option 3) $zero\;$	Option 4) $K/4$

In the reaction,

$2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}$

Option 1) $11.2\, L\, H_{2(g)}$ at STP is produced for every mole $HCL_{(aq)}$ consumed	Option 2) $6L\, HCl_{(aq)}$ is consumed for ever $3L\, H_{2(g)}$ produced
Option 3) $33.6 L\, H_{2(g)}$ is produced regardless of temperature and pressure for every mole Al that reacts	Option 4) $67.2\, L\, H_{2(g)}$ at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, $Mg_{3}(PO_{4})_{2}$ will contain 0.25 mole of oxygen atoms?

Option 1) 0.02	Option 2) 3.125 × 10^-2
Option 3) 1.25 × 10^-2	Option 4) 2.5 × 10^-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1) decrease twice	Option 2) increase two fold
Option 3) remain unchanged	Option 4) be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1) Molality	Option 2) Weight fraction of solute
Option 3) Fraction of solute present in water	Option 4) Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol^-1) is

Option 1) twice that in 60 g carbon	Option 2) 6.023 × 10²²
Option 3) half that in 8 g He	Option 4) 558.5 × 6.023 × 10²³

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t²) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m² , the number of rotations made by the pulley before its direction of motion if reversed, is