NCERT Solutions | Class 8 Science Chapter 15 | Some Natural Phenomena

CBSE Solutions | Science Class 8

Check the below NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena Pdf free download. NCERT Solutions Class 8 Science were prepared based on the latest exam pattern. We have Provided Some Natural Phenomena Class 8 Science NCERT Solutions to help students understand the concept very well.

NCERT | Class 8 Science

NCERT Solutions Class 8 Science
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	8th
Subject:	Science
Chapter:	15
Chapters Name:	Some Natural Phenomena
Medium:	English

Some Natural Phenomena | Class 8 Science | NCERT Books Solutions

You can refer to MCQ Questions for Class 8 Science Chapter 15 Some Natural Phenomena to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

NCERT TEXTBOOK EXERCISES

Select the correct option in Questions 1 and 2.

ncert science class 8 solutions, Question 1.

Which of the following cannot be changed easily by friction?
(a) A plastic scale
(b) copper rod
(c) An inflated balloon
(d) A woolen cloth.

ncert class 8 science Chapter 15 question answer, Answer :

(b) A copper rod.

ncert science class 8 textbook pdf, Question 2.

When a glass rod is rubbed with a piece of silk cloth the rod
(а) and the cloth both acquire a positive charge.
(b) becomes positively charged while the cloth has a negative charge.
(c) and the cloth both acquire a negative charge.
(d) becomes negatively charged while the cloth has a positive charge,

cbse science class 8 solutions, Answer :

(d) becomes negatively charged while the cloth has a positive charge.

NCERT Solutions for Class 8 Science, Question 3.

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 attracts 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)

ncert class 8 science Chapter 15 question answer, Answer :

(a) False
(b) True
(c) False
(d) False

NCERT Solutions for Class 8 Science Chapter 15, Question 4.

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

cbse science class 8 solutions, Answer :

The crackling sound is heard because when the sweater is rubbed while taking it off, it acquires a small charge.

science class 8 Chapter 15, Question 5.

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

ncert class 8 science Chapter 15 question answer, Answer :

When we touch a charged body the total charge is transferred into the earth through our body and it loses its charge.

science class 8 pdf, Question 6.

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?

cbse science class 8 solutions, Answer :

The destructive energy of an earthquake is measured on a scale called the Richter scale. An earthquake that measures 3 on the Richter scale Will be recorded by a seismograph. However, it is not likely to cause much damage.

cbse class 8 science book, Question 7.

Suggest three measures to protect ourselves from lightning.

ncert class 8 science Chapter 15 question answer, Answer :

We should not use TV or cable phone during lightning.
After hearing the last thunder, wait for at least 30 minutes before coming out of the safe place.
A house or a building is a safe place. If you are travelling by car or by bus, you are safe inside with the windows and doors of the vehicle shut.

cbse class 8 science Chapter 15, Question 8.

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

cbse science class 8 solutions, Answer :

A charged balloon is repelled by another charged balloon because both have the same charge. And we know similar charges repel each other. But a charged balloon attracts an uncharged balloon and loses its own charge to the other balloon.

cbse class 8 science notes pdf, Question 9.

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

ncert class 8 science Chapter 15 question answer, Answer :

Electroscope: An electroscope is a device used to detect the presence of charge of an object.
Principle: It works on the principle that like charges repel while unlike charges attract each other.
NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena 1

NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena 1

Structure and Working: An electroscope has a metal rod with a thin metal strip or leaf attached to it at the bottom. At the top, the rod enters into a cup. The bottom part of the rod and leaf is enclosed in a glass box for protection. When the knob of the electroscope is touched with a charged ebonite or glass rod, the leaves open out or diverge. The extent of divergence depends upon the amount of charge on the electroscope.

cbse class 8 science syllabus pdf, Question 10.

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

cbse science class 8 solutions, Answer :

The states that fall in seismic zones are more earthquake-prone. Jammu and Kashmir, Himachal Pradesh, and Gujarat are a few such states.

cbse science class 8 book, Question 11.

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

ncert class 8 science Chapter 15 question answer, Answer :

Find a safe place, that will be away from buildings, trees and overhead power lines. Do not be on the ground but squat low on it to make yourself the smallest target to be struck.
If we are in a car or a bus, we should not come out, as the driver needs to drive slowly to a clear spot. Do not come out till the earthquake stops.

cbse science class 8 book pdf, Question 12.

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.

cbse science class 8 solutions, Answer :

No, I would not carry an umbrella. Because the pointed rod of the umbrella can become a target of lightning.