Some Natural Phenomena - Class 8 Science - Chapter 13 - Notes, NCERT Solutions & Extra Questions
Renews every month. Cancel anytime
Your personal doubt-solving assistant
Chatterbot AI gives you 100% accurate answers to your questions in an instant.
Notes - Some Natural Phenomena | Class 8 NCERT | Science
Comprehensive Class 8 Notes on Some Natural Phenomena
Natural phenomena are occurrences in nature that often bewilder us and impact life on Earth. This article dives into two significant natural phenomena—lightning and earthquakes, their scientific explanations, safety measures, and experiments to understand these phenomena better.
Understanding Lightning
Lightning is essentially a massive electric spark. Just as you might sometimes see small sparks around plugged-in devices at home, lightning is a similar event but on a much larger scale. In ancient times, the true nature of lightning wasn't understood, and it was often attributed to the wrath of gods....
We've got so much more in store, just for you! 🤩
Sign up to unlock Notes and everything else
Unlock now 🔓🚀 Learn more about Notes with Chatterbot AI
Notes - Flashcards - Some Natural Phenomena | Class 8 NCERT | Science
Back Questions - Some Natural Phenomena | NCERT | Science | Class 8
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.
(b) A copper rod
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.
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
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)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Explain why a charged body loses its charge if we touch it with our hand.
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
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?
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Suggest three measures to protect ourselves from lightning.
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Explain why a charged balloon is repelled by another charged balloon, whereas an uncharged balloon is attracted by another charged balloon?
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Describe with the help of a diagram an instrument that can be used to detect a charged body.
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
List three states in India where earthquakes are more likely to strike.
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Suppose you are outside your home and an earthquake strikes. What precautions would you take to protect yourself?
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
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.
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
💡 Have more questions?
Ask Chatterbot AIShort Questions - Some Natural Phenomena | NCERT | Science | Class 8
Can you explain why an electric spark occurs?
An electric spark occurs due to the accumulation of charges in certain areas like clouds or on objects. These accumulated charges create a high electric field around them. When this electric field becomes sufficiently high, it forces the nearby free electrons to accelerate to very high velocities. On collision with other atoms, these fast-moving electrons can knock off more electrons leading to a chain reaction causing a rapid de-neutralization resulting in a spark.
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Why is it not safe to touch electrical wires, metal pipes and telephone cords during a thunderstorm?
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
💡 Have more questions?
Ask Chatterbot AILong Questions - Some Natural Phenomena | NCERT | Science | Class 8
Discuss in detail how the phenomenon of lightning occurs and how it's related to the commonly observed sparks when wires or plugs are loose? Also, explain the preventive measures we need to adopt to protect ourselves from the harmful effects of lightning.
Lightning is an electric spark on a gigantic scale caused by the accumulation of charges in the clouds due to upward-moving air currents and downward-falling water droplets. These charges trigger an electric discharge, similar to the sparks seen when electric wires or plugs are loose.
To protect ourselves from lightning, we should take refuge in a building or a vehicle with closed windows and doors. Open fields, tall trees, elevated places, and carrying umbrellas can increase the risk of lightning strikes. Inside the house, avoid contact with telephone cords, electrical wires, metal pipes, and running water. Electronic devices should be unplugged.
Lightning Conductors, installed in buildings, provide a safe route for the charge to be transferred to the ground, minimising the damage from a lightning strike.
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
Improve your grades!
Join English Chatterbox to access detailed and curated answers, and score higher than you ever have in your exams.
Sign up now![Boost your exam scores](https://www.englishchatterbox.com/frontend/v4/assets/img/rocket-launch.png)
💡 Have more questions?
Ask Chatterbot AIExtra Questions - Some Natural Phenomena | NCERT | Science | Class 8
Statement "Science day falls on Friday" is
A) always true
B) always false
C) ambiguous
D) true for leap years
The correct answer is C) ambiguous.
The statement "Science day falls on Friday" is ambiguous because it does not specify which science day or for which year it is referencing. Without this information, we cannot definitively say whether Science day falls on a Friday or not. Therefore, the statement can be true in some years and false in others, leading to ambiguity.
💡 Have more questions?
Ask Chatterbot AI