15. Some Natural Phenomena Class 8 Science [LATEST] Solutions Text Book Exercise in English - CBSE Study
NCERT Solutions for Class 8 Science are carefully prepared according to the latest CBSE syllabus and NCERT textbooks to help students understand every concept clearly. These solutions cover all important 15. Some Natural Phenomena with detailed explanations and step-by-step answers for better exam preparation. Each Text Book Exercise is explained in simple language so that students can easily grasp the fundamentals and improve their academic performance. The study material is designed to support daily homework, revision practice, and final exam preparation for Class 8 students. With accurate answers, concept clarity, and structured content, these NCERT solutions help learners build confidence and score higher marks in their examinations. Whether you are revising a specific topic or preparing an entire chapter, this resource provides reliable and syllabus-based guidance for complete success in Science.
Class 8 English Medium Science All Chapters:
15. Some Natural Phenomena
3. Text Book Exercise
Exercise
1. 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.
2. 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.
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 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)-f (b)-t (c)-f (d)-f
4. Sometime, a crackling sound is heard while taking off sweater during winters. Explain.
Answer:
A crackling sound is heard because when the sweater is rubbed while taking it, off, it acuquires a small charge.
5. Explain why a charged body loses its charge if we touch it with our hand.
Answer:
Our body is a conductor of electricity. When we touch a charged body loses charge to the earth through our body.
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?
Answer:
The destructive energy of an earthquakq is measured on a scale called Richter scale.
An earthquake that meausure 3 on the Richter scale will be recorded by seismograph However, it is not likely to cause much damage.
7. Suggest three measures to protect ourselves from lightning.
Answer:
(i) We should rush to a safer place like house or building.
(ii)
8. Explain why a charged balloon is repelled by another charged balloon whereas an uncharged balloon is attracted by another charged balloon?
Answer:
A charged ballon is replled by another ballon beecause both have the same charge. And we know similar charges repel each oother.
Butt a charged ballon attracts an uncharged ballon and lose itts own charge too the other ballon.
9. Describe with the help of a diagram an instrument which can be used to detect a charged body.
10. List three states in India where earthquakes are more likely to strike.
Answer:
The states that fall in seismic zones are more earthquake-prone. Jammu and Kashmir, Himachal Pradesh, and Gujrat are a few such states.
Topic Lists: