InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Name the following:i. Two aquatic animals found in the ocean.ii. Places where volcanic eruptions occur. |
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Answer» i.
ii.
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| 2. |
Which oceanic organism develops in it? |
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Answer» The oceanic organism oyster develops in it. |
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| 3. |
Where does the water flowing through the rivers go in the end? |
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Answer» The water flowing through the rivers goes into the oceans in the end. |
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| 4. |
What happens when aquatic animals die? |
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Answer» When aquatic animals die, their remains accumulate in the oceans. |
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| 5. |
How is salt obtained? |
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Answer» Salt as a substance is obtained by constructing salt pans in the coastal areas. |
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| 6. |
Where do we find maximum salinity? |
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Answer» The Dead Sea is known to have the maximum salinity of 332%. |
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| 7. |
What enters the ocean with the rain water? |
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Answer» Sediments from eroded lands, trees and bushes flowing with water, dead remains, etc. enter the ocean with the river water. |
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| 8. |
What would have happened if man had not discovered sea routes? |
Answer»
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| 9. |
Find the odd man out:i. Shell, fish, crab, shipii. Arabian Sea, Mediterranean Sea, Dead Sea, Caspian Seaiii. Sri Lanka, India, Norway, Peruiv. Southern Ocean, Indian Ocean, Pacific Ocean, Bay of Bengalv. Natural gas, salt, gold, manganese |
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Answer» i. ship ii. Dead Sea iii. Sri Lanka iv. Bay of Bengal v. Natural gas |
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| 10. |
Collect information about how a natural pearl is formed. |
Answer»
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| 11. |
What happens when the dead remains in the ocean decompose? |
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Answer» When the dead remains in the oceans decompose it releases various minerals and salts in the ocean water. |
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| 12. |
Where did all this water on the earth come from? |
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Answer» While some scientists believe that water was created due to the impact of comets there are others who believe that Earth’s waters have existed since the birth of planet earth. |
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| 13. |
Which is one of the ancient occupations of human beings and what is the major purpose of his activity? |
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Answer» Fishing is one of the ancient occupation and the major purpose of this activity is to obtain food. |
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| 14. |
Which items does man get from the oceans? |
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Answer» Salt, fish, shells and other products, minerals like iron, lead, cobalt, sodium, manganese, chromium, zinc, mineral oil and natural gas are the items man gets from oceans. |
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| 15. |
Which continents are located along the coast of the Pacific Ocean? |
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Answer» Asia, Australia, North America and South America are the continents located along the coast of the Pacific Ocean. |
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| 16. |
Name the following:Two actions by man which has lead to large scale pollution in oceanic waters. |
Answer»
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| 17. |
How does the earth get rainfall? |
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Answer» The oceans have a vast expanse, therefore huge amounts of vapour get created and this process goes on continuously and from this vapour the earth gets rainfall. |
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| 18. |
Why There is a difference in the climate of regions close to the oceans and regions far away from the oceans. |
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Answer» (i) The oceans influence the climatic condition of a place. Coastal areas are cooler and wetter than regions away from the ocean. (ii) There is a difference in the maximum and minimum temperature with the difference being less in coastal region (nearness to the sea) while it is more in the region far away from the sea (continentality). (iii) The temperature in coastal areas remains equable due to the mixing of vapour released through evaporation of water from these water bodies into air. This vapour absorbs and stores the heat released from the land. |
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| 19. |
Give reason:The ocean water is saltier than drinking water. |
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Answer» (i) In drinking water, the proportion of salts is quite low. Water from oceans and seas has a greater amount of salt. Hence it tastes salty. (ii) Volcanic eruptions leads to increase in the level of salts and minerals in ocean water. (iii) Volcanic eruptions takes place in the oceans. During volcanic eruptions different minerals, ashes, salts and gases are added to the water. This increases the level of salts and minerals in ocean water. (iv) Due to continuous evaporation of oceanic water, the proportion of salt increase. |
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| 20. |
How is pollution caused in oceanic water? |
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Answer» In order to fulfill his requirements, man undertakes many activities that lead to the production of huge amounts of different types of waste materials which cause pollution. |
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| 21. |
Match the pairs correctly:OceansThe area in sq. km(1) Pacific(a) 20,327,000(2) Atlantic(b) 73,426,163(3) Indian(c) 166,240,977(4) Southern(d) 13,224,479(5) the Arctic(e) 86,557,402 |
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Answer» 1 – c 2 – e 3 – b 4 – a 5 – d |
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| 22. |
Give reason:There is a difference in the climate of regions close to the oceans and regions far away from the oceans. |
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Answer» (i) The oceans influence the climatic condition of a place. Coastal areas are cooler and wetter than regions away from the ocean. (ii) There is a difference in the maximum and minimum temperature with the difference being less in coastal region (nearness to the sea) while it is more in the region far away from the sea (continentality). (iii) The temperature in coastal areas remains equable due to the mixing of vapour released through evaporation of water from these water bodies into air. This vapour absorbs and stores the heat released from the land. |
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| 23. |
Give reason:Oceans act as the controller of global temperature. |
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Answer» (i) Winds move the oceanic water in the form of currents. (ii) Ocean currents move from the equatorial region to polar regions and from polar regions to the equatorial region. (iii) This leads to the redistribution of heat on the earth. (iv) The cold currents moving towards the equatorial region making the temperature of coastal areas in that zone milder whereas the warm currents coming in the colder region cause the temperature in coastal areas to rise. Hence, the oceans act as the controller of global temperature. |
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| 24. |
Fill the blanks choosing the correct alternatives from the brackets:i. The average salinity of oceanic water is _______.(80%, 332%, 35%)ii. The salinity of the Dead Sea is _____.(332 %, 35%, 60%)iii. About ________ of the surface of the earth is occupied by water. (90%, 95%, 70.8%)iv. Salt as a substance is obtained by constructing ______. (sea bed, salt pan, river bunds)v. ________ is conducted on a much higher scale as compared to the other modes of transport. (Water transport, Air transport, Road transport)vi. Pollution of _________ water is caused due to oil spills. (river, lake, oceanic)vii. Winds blowing due to pressure difference in the belts is called ______. (planetary winds, oceanic winds, minerals) |
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Answer» i. 35% ii. 332 % iii. 70.8% iv. salt pan v. Water transport vi. oceanic vii. planetary winds |
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| 25. |
Fill the blanks choosing the correct alternatives from the brackets:i. The ______ includes all the water bodies like oceans, seas, rivers and their tributaries, lakes, reservoirs and also ground water that exist on the earth. (lithosphere, atmosphere, hydrosphere)ii. Total global water 97.7% is contained in ______ (lakes, oceans, seas)iii. The ocean with an area 166,240,977 sq. km is the _______ ocean. (Indian, Atlantic, Pacific)iv. All rivers flowing from mountains or hilly areas finally meet in the ________.(lakes, seas, oceans)v. Salinity is expressed in terms of ______.(mils, ml, gms) |
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Answer» i. hydrosphere ii. oceans iii. Pacific iv. oceans v. mils |
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| 26. |
Name the following:i. Two countries with coastline which largely depends on the sea for their livelihood.ii. The controller of global temperature and source of rains. |
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Answer» i.
ii. Oceans. |
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