{"id":13157,"date":"2020-10-13T18:07:39","date_gmt":"2020-10-13T12:37:39","guid":{"rendered":"https:\/\/mcq-questions.com\/?p=13157"},"modified":"2022-03-02T11:16:22","modified_gmt":"2022-03-02T05:46:22","slug":"some-natural-phenomena-class-8-extra-questions","status":"publish","type":"post","link":"https:\/\/mcq-questions.com\/some-natural-phenomena-class-8-extra-questions\/","title":{"rendered":"Some Natural Phenomena Class 8 Extra Questions and Answers Science Chapter 15"},"content":{"rendered":"

Some Natural Phenomena Class 8 Extra Questions and Answers Science Chapter 15 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 8 Science<\/a> Question bank on a regular basis.<\/p>\n

Class 8 Science Chapter 15 Extra Questions and Answers Some Natural Phenomena<\/h2>\n

Extra Questions for Class 8 Science Chapter 15 Some Natural Phenomena with Answers<\/strong><\/p>\n

Some Natural Phenomena Class 8 Extra Questions Very Short Answer Type<\/h3>\n

Question 1.
\nWhat happens when a charged balloon is brought close to another charged balloon?
\nAnswer:
\nThey repel each other.<\/p>\n

\"Some<\/p>\n

Question 2.
\nWhy does a charged eraser when brought close to another charged rubber, repel each other?
\nAnswer:
\nBecause similar charges repel each other.<\/p>\n

Question 3.
\nWhat happens when a charged eraser is brought close to charged balloon and why?
\nAnswer:
\nThey would attract each other because opposite charges attract.<\/p>\n

Question 4.
\nWhy does a charged glass rod attract a charged plastic straw? Give reason.
\nAnswer:
\nThere are two opposite charges, therefore, they attract each other.<\/p>\n

Question 5.
\nAre metals good conductors?
\nAnswer:
\nYes, all metals are good conductors.<\/p>\n

Question 6.
\nWhy do paper strips receive the same charge from the charged refill through the metallic needle?
\nAnswer:
\nBecause metals are good conductor of electricity. So, it contributes same charge to the paper strips through the metallic needle.<\/p>\n

Question 7.
\nWhat happens when person touches the metallic wire of an electro\u00acscope after charging of foil strips ? Give reasons for your answer.
\nAnswer:
\nWhen a person touches the metallic wire of an electroscope after charging its foil strips; the foil strips collapse. It happens so because the foil strips lose charge to the earth through human body which is a good conductor of electricity.<\/p>\n

Question 8.
\nIs carrying umbrella during thunderstorm advisable? Why?
\nAnswer:
\nNo, carrying umbrella during the thunderstorm is not advisable, because lightning may strike on the person carrying the umbrella due to its pointed rod.<\/p>\n

\"Some<\/p>\n

Question 9.
\nIf one is in the forest, where should he take shelter during thunderstorm?
\nAnswer:
\nThe person should take shelter under the shortest trees around him.<\/p>\n

Question 10.
\nDuring thunderstorm, which phone, should be used mobile phone, cordless phone or landline ?
\nAnswer:
\nIt is safe to use mobile phones and cordless phones.<\/p>\n

Question 11.
\nShould one take bath during thunderstorm ?
\nAnswer:
\nBathing should be avoided during thunderstorm to avoid contact with running water. .<\/p>\n

Question 12.
\nWhat would you do with T.V., computers, etc. during thunderstorm ?
\nAnswer:
\nThese should not be played, instead these should be unplugged.<\/p>\n

Question 13.
\nWhat parts of human body are damaged by lightning ?
\nAnswer:
\nDamage to nervous system, burn injuries, loss of hearing or sight, short-term memory loss, broken bones, etc., can occur due to lightning.<\/p>\n

Question 14.
\nCan you predict the occurrence of earthquake ?
\nAnswer:
\nNo, prediction of earthquake is not possible.<\/p>\n

\"Some<\/p>\n

Question 15.
\nWhen did the last major earthquake take place in India and where ?
\nAnswer:
\nThe last major earthquake in India occurred on 8th of October 2005 in Uri and Tangdhar towns of north Kashmir.<\/p>\n

Question 16.
\nIs Richter a linear scale ?
\nAnswer:
\nNo, Richter scale is not a linear scale.<\/p>\n

Question 17.
\nWhat is responsible for sparks in the sky ?
\nAnswer:
\nElectricity is responsible for this phenomenon.<\/p>\n

Question 18.
\nWhich phenomenon is yet to be predicted?
\nAnswer:
\nIt is an earthquake.<\/p>\n

Some Natural Phenomena Class 8 Extra Questions Short Answer Type 1<\/h3>\n

Question 1.
\nWhat was known to ancient Greeks about amber?
\nAnswer:
\nThe ancient Greeks knew as early as 600 BC that amber (a kind of resin), when rubbed with fur, attracted light objects such as hairs, twigs, etc.<\/p>\n

Question 2.
\nIf amber is rubbed for long enough, what happens as per Greeks ?
\nAnswer:
\nAs per Greeks when amber is rubbed for long enough, it could even generate a spark.<\/p>\n

\"Some<\/p>\n

Question 3.
\nWhat happens when a plastic scale is rubbed on dry hair? Why?
\nAnswer:
\nIf plastic scale is rubbed on dry hair, the scale can attract very small pieces of paper because the scale develops charge on rubbing.<\/p>\n

Question 4.
\nWhat happens when a plastic refill is rubbed with polythene ?
\nAnswer:
\nWhen a plastic refill is rubbed with polythene, it acquires a small electric charge (negative).<\/p>\n

Question 5.
\nHow many types of charges are there ? What happens between two like charges and between two unlike charges if brought closer ?
\nAnswer:
\nThere are two types of charges – positive charges and negative charges. When two like charges are brought closer, they repel each other. When two unlike charges are brought closer to one another, they attract each other.<\/p>\n

Question 6.
\nWhat type of charges are there on plastic straw and glass rod ?
\nAnswer:
\nThere is a negative charge on the plastic straw and is positive charge on glass rod. That is why, they attract one another.<\/p>\n

Question 7.
\nWhat name is given to the electrical charge generated by rubbing ?
\nAnswer:
\nThe electrical charge generated by rubbing is called static electricity because these charges do not move.<\/p>\n

Question 8.
\nWhat name is given to the electricity generated when charges move ?
\nAnswer:
\nWhen the charges move from one conducting body to another, they generate electricity called current electricity.<\/p>\n

\"Some<\/p>\n

Question 9.
\nWhat is meant by the term earthing? What is its advantage?
\nAnswer:
\nThe process of transfer of charges from a charged object to the earth is known as earthing. It is provided iri the electrical wiring in buildings to protect people from electrical shock due to any leakage of the electric current.<\/p>\n

Question 10.
\nWhat happens during the development of a thunderstorm ?
\nAnswer:
\nDuring the development of a thunderstorm, the air currents move upward while the v water droplets move downward. This vigorous movements cause separation of charges.<\/p>\n

Question 11.
\nWhich is the safest place during the lightning and thunderstorms ?
\nAnswer:
\nA house or building is the safest place. If someone is travelling by a car or by bus, he\/she is safe inside with windows and doors of the vehicle shut.<\/p>\n

Question 12.
\nWhat are the destruction caused by the natural phenomena like thunderstorm, cyclone and lightning? Can these phenomena be predicted?
\nAnswer:
\nThese natural phenomena can cause large scale destruction of human life and property. Yes, these phenomena, fortunately, : can be predicted to some extent. The weather department can warn about a thunderstorm developing in some areas.<\/p>\n

Question 13.
\nWhat is an earthquake? How does it take place?
\nAnswer:
\nAn earthquake is a sudden shaking or trembling of the earth. It is caused by a disturbance deep inside the earth\u2019s crust.<\/p>\n

\"Some<\/p>\n

Question 14.
\nWhat are seismic waves? Name the instrument that records these waves.
\nAnswer:
\nThe waves produced on the surface of the earth by tremors are called the seismic waves. These waves are recorded by an instrument called the Seismograph.<\/p>\n

Question 15.
\nHow is the power of an earthquake expressed ? What is the magnitude of destructive earthquake on this scale?
\nAnswer:
\nThe power of an earthquake is expressed in terms of magnitude on a scale called Richter scale. On this scale, the destructive earthquakes have magnitudes higher than 7.<\/p>\n

Question 16.
\nWhich areas in India are prone to earthquake?
\nAnswer:
\nIn India, Kashmir, western and Central Himalayas, the whole of North-East, Rann of Kachchh, Rajasthan and Indo-Gangetic, Plain are prone to earthquake. Some areas of south India also fall in the danger zone.<\/p>\n

Some Natural Phenomena Class 8 Extra Questions Short Answer Type 2<\/h3>\n

Question 1.
\nIf an earthquake is of magnitude in this scale. Would it cause much damage?
\nAnswer:
\nNo, it will not cause much damage. Destructive energy of an earthquake is measured on the Richter scale. The earthquake measuring 7 or more on Richter scale can cause severe damage to life and property.<\/p>\n

\"Some<\/p>\n

Question 2.
\nWhat are the safety measures against lightning?
\nAnswer:
\nDuring thunderstorm and lightning, no place outside is safe. That is why hearing a thunder we should rush to a safer place.<\/p>\n

A house or a building is the safest place. If anybody is travelling by a car or bus, he\/ she is safe inside with windows and doors of the vehicle shut.<\/p>\n

Question 3.
\nDescribe the meaning, use and construction of lightning conductor.
\nAnswer:
\nLightning conductor is a device used to protect tall building from the effect of lightning.
\nConstruction: A metallic rod taller than the height of the building, is installed in the walls of the building during its construction. One end of the rod is kept out in the air and the other is fixed in the ground.
\nUse: Lightning rod provides easy route for transfer of electric discharge to the ground.
\nPrecaution: It should not be touched during a thunderstorm.<\/p>\n

Question 4.
\nIf a thunderstorm occurs, what should you do ?
\nAnswer:
\nIf a thunderstorm occurs, there is always a possibility of lightning and cyclone accompanying it. So, it is better for us to take measures to protect ourselves from the damage caused by these events. Inside the house one should avoid using telephone, television, etc.<\/p>\n

Bathing should be avoided during the thunderstorm to avoid contact with running water. Electrical appliances should be plugged off. If someone is outside, he\/she should take shelter under shorter tree. When someone is in the open field, he\/she should stay away from tall tree, electric poles, etc.<\/p>\n

Question 5.
\nWhat are the damages caused by the earthquake? Name the place where some major earthquake occurred recently.
\nAnswer:
\nEarthquake is a natural phenomenon, which we are not yet able to predict. It can cause damage to human life and property on a large scale. The earthquake can cause floods, landslides and tsunami.<\/p>\n

The last major earthquake which occurred in India was on 8th October 2005 in Uri and Tangdhar towns of North Kashmir. Before that a major earthquake occurred on 26th January 2001 in Bhuj district of Gujarat.<\/p>\n

Question 6.
\nWhat is weak zone or fault zone? Name some of these zones in India.
\nAnswer:
\nSince earthquakes are caused by the movements of plates, the boundaries of the plates are the weak zones of fault zone, where earthquakes are more likely to occur. In India, the areas most threatened are Kashmir, Western and Central Himalayas, the whole of North-East, Rann of Kachchh, Rajasthan and the Indo-Gangetic Plain. Some areas of South India also fall in the danger zone.<\/p>\n

\"Some<\/p>\n

Question 7.
\nWhat is a Richter scale? Is it linear? What are the magnitudes of earthquakes that can cause severe damage to life and properties?
\nAnswer:
\nThe power of an earthquake is expressed in terms of magnitudes on a scale called Richter scale. This scale is not linear. The earthquake of magnitude 7 or more is destructive and can cause severe damage to life and property.<\/p>\n

Some Natural Phenomena Class 8 Extra Questions Long Answer Type<\/h3>\n

Question 1.
\nWhat are the suggestions that can be followed to protect buildings against earthquakes?
\nAnswer:
\nGiven below are the suggestions that can be followed to protect buildings against earthquakes :<\/p>\n

    \n
  1. The buildings should be so designed that they become \u2018Quake Safe\u2019. For this purpose, qualified architects and structural engineers should be consulted.<\/li>\n
  2. In highly seismic areas, the use of mud or timber is better than using heavy construction material. Roofs should be kept as light as possible. In case the structure falls, the damage will not be heavy.<\/li>\n
  3. Cupboards and shelves should be fixed to the walls, so that they do not fall easily.<\/li>\n
  4. Since some buildings may catch fire due to an earthquake, it is necessary that all buildings, especially tall buildings, have fire fighting equipment in working order.<\/li>\n<\/ol>\n

    Question 2.
    \nWhat steps should be taken for protection if an earthquake strikes ?
    \nAnswer:
    \nIn the event that an earthquake does strike, the following steps should be taken for protection:
    \n(A) At home:<\/p>\n

      \n
    1. One should take shelter under a table and stay there till shaking stops.<\/li>\n
    2. One should stay away from windows.<\/li>\n
    3. One should stay away from tall and heavy objects that may fall on him\/her.<\/li>\n
    4. If anybody is in bed, he\/she should not get up but protect his\/her head with a pillow.<\/li>\n<\/ol>\n

      (B) Outdoors :<\/p>\n

        \n
      1. One should find out a clear spot away from buildings, trees and overhead powerlines and drop to the ground.<\/li>\n
      2. If anybody is in a car or a bus, he\/she should not come out. Instead the driver should be asked to drive slowly to a clear spot and should not come out till the tremors stop.<\/li>\n<\/ol>\n

        Question 3.
        \nWhat are the causes of earthquakes? Describe the major cause.
        \nAnswer:
        \nCauses of earthquakes:
        \n(i) Movement of the earth\u2019s plates (major cause): The outermost layer of the earth is not in one piece. It is fragmented. Each fragment is called a plate. These plates are in continued motion. The boundaries of the plates are the weak zones, where earthquakes are more likely to occur due to sliding of one plate over or below the other. The weak zones are also known as seismic or fault zones.
        \n(ii) Volcanic eruption.
        \n(iii) Underground nuclear explosion.
        \n(iv) When earth is hit by a meteor.<\/p>\n

        \"Some<\/p>\n

        Question 4.
        \nDescribe some of the precautions which are intended to safeguard people\u2019s life and property against lightning.
        \nAnswer:
        \nPrecautions which are intended to safeguard people\u2019s life and property against lightning are:
        \nA. Outside<\/p>\n

          \n
        1. Use of open vehicles like motorcycle, tractor etc. should be avoided.<\/li>\n
        2. Do not carry umbrella during thunderstorm.<\/li>\n
        3. If in a forest, take shelter under shorter trees.<\/li>\n
        4. If no shelter is available, we should stay far from tall trees, poles or other metal object. We should squat low to the ground.<\/li>\n<\/ol>\n

          B. Inside the house<\/p>\n

            \n
          1. During a thunderstorm, we should, avoid contact with telephone cords, electrical wires and metal pipes.<\/li>\n
          2. Bathing should be avoided during thunderstorms to avoid contact with running water.<\/li>\n
          3. Electrical appliances like computer, T.V., A.C., etc. should be unplugged. Electrical lights remaining on do not cause any harm.<\/li>\n<\/ol>\n

            Hope the knowledge provided regarding the Some Natural Phenomena Class 8 Extra Questions and Answers has helped you to the possible extent. For more info feel free to reach us and we will guide you at the earliest possibility. Stay connected to our site to avail latest updates on Extra Questions for Various Classes instantly.<\/p>\n","protected":false},"excerpt":{"rendered":"

            Some Natural Phenomena Class 8 Extra Questions and Answers Science Chapter 15 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 8 Science Question bank on a regular basis. Class 8 Science Chapter 15 Extra …<\/p>\n

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