Class 6/ GEOGRAPHY / 6.IMPORTANCE OF OCEANS / QUESTIONS AND ANSWERS /PAGE NO.39
CLASS 6 : GEOGRAPHY
6.IMPORTANCE OF OCEANS (EXERCISE)(Page no. 39 and extra questions from text book)
Q A. Find the off man out.
1. Shell, fish, crab, ship
Ans: Ship
2. Arebian sea, Mediterranean Sea, Dead Sea, Caspian Sea.
Ans: Dead Sea( Dead sea is smaller than all other Seas mentioned here)
3. Sri Lanka,India, Norway, Peru
Ans.: Peru ( Peru is South to the Equator and all others are North to the Equator)
4. Southern Ocean, Indian Ocean, Pacific Ocean, Bay of Bengal
Ans.: Bay of Bengal ( its a bay and all others are Oceans)
5. Natural gas, salt, gold, Manganese
Ans.: Natural gas ( its a gas, others are minerals)
Q.B Write the answers.
1.. Which items does man get from the oceans?
Ans.: Man gets the following items from the Oceans.
1. Food items like prawns, clams, crabs, seer fish, macrerel, pomfret, Indian shark, Indian Salmon andy many other aquatic animals.
2. Minerals like iron, lead, cobalt, sodium, manganese, chromium, zinc etc.
3. Precious items like pearls, corals or ornamental items like shells.
5.Medicinal plants
2.Why is it economic to carry out transport by waterways?
Ans.: It is economic to carry out transport by waterways because:
1. Ocean currents are quite important in water transport. As far as possible water is carried out along ocean currents. They accelerate the speed of ships and also save fuel to a considerable extent.
2. The bulky materials like coal, crude oil, raw materials, metallic minerals, food grains etc. Can be transported at ease.
3. Why is there a difference in the Climate of regions close to the oceans and regions far away from the Oceans?
Ans.: A difference in the Climate of regions close to the oceans and regions far away from the Oceans because in the regions close to the Oceans seas or large reservoirs, there is not much of a difference in the temperature thorough out the day. The main reason for it is the mixing of vapour released through evaporation of water from these water bodies in to air. This vapour in the air absorbs and stores the heat released from land.Hence the temperature in coastal areas remains equable.
On the continental region due to lack of vapour there we see different temperature.
4. Which continents are located along the coast of Pacific Ocean?
Ans.: The continents of North America South America, Asia and Australia are located along the coast of Pacific Ocean.
Q.3. See figure 6.5 and answer the following questions.
1. What items are included in our diet?
Ans.: In our diet Chapati, roti, dal rice, vegetables, idli, vada, thalipit, paratha mutton, chicken eggs etc are included.
2. Which items amongst those shown come under non-vegetarian food?
Ans.: Mutton/meat, chicken ,fish & prawns come under non - vegetarian food.
3. Which of these are prepared from aquatic creatures?
Ans: Fish, prawns are prepared from aquatic creatures.
Q.4 Answer the following.
1.What do the dead remains release in the ocean water?
Ans. The dead remains release minerals and salts in the ocean water.
2. What are added to the water during volcanic eruptions?
Ans. During volcanic eruptions different minerals, ashes, salts and gases are added to the water.
3. Which things make the ocean water salty?
Ans. The releasing of minerals and salt due to decomposition of dead remains and minerals, ashes, salts and gases from volcanic eruptions make the water salty.
4. In what term salinity is expressed?
Ans. Salinity is expressed in terms of mils (particles per thousand)
5. What is the average salinity of oceanic water?
Ans. The average salinity of oceanic water is 35°/00.
6. What is the salinity of Dead sea?
Ans. The Dead sea is known to have maximum salinity i.e. 332°/00.
7. What are Planetary Winds?
Ans. Planetary Winds are winds blow due to pressure difference in the belts.
8. What are the source of rain?
Ans. Oceans are the source of rain.
9. Which is the most economic option of transportation?
Ans: Oceans are the most economic option of transportation.
10. Which is the serious issue related to oceans.?
Ans: Pollution of oceanic waters is a major and serious issue that developed in recent times.
6.IMPORTANCE OF OCEANS (EXERCISE)(Page no. 39 and extra questions from text book)
Q A. Find the off man out.
1. Shell, fish, crab, ship
Ans: Ship
2. Arebian sea, Mediterranean Sea, Dead Sea, Caspian Sea.
Ans: Dead Sea( Dead sea is smaller than all other Seas mentioned here)
3. Sri Lanka,India, Norway, Peru
Ans.: Peru ( Peru is South to the Equator and all others are North to the Equator)
4. Southern Ocean, Indian Ocean, Pacific Ocean, Bay of Bengal
Ans.: Bay of Bengal ( its a bay and all others are Oceans)
5. Natural gas, salt, gold, Manganese
Ans.: Natural gas ( its a gas, others are minerals)
Q.B Write the answers.
1.. Which items does man get from the oceans?
Ans.: Man gets the following items from the Oceans.
1. Food items like prawns, clams, crabs, seer fish, macrerel, pomfret, Indian shark, Indian Salmon andy many other aquatic animals.
2. Minerals like iron, lead, cobalt, sodium, manganese, chromium, zinc etc.
3. Precious items like pearls, corals or ornamental items like shells.
5.Medicinal plants
2.Why is it economic to carry out transport by waterways?
Ans.: It is economic to carry out transport by waterways because:
1. Ocean currents are quite important in water transport. As far as possible water is carried out along ocean currents. They accelerate the speed of ships and also save fuel to a considerable extent.
2. The bulky materials like coal, crude oil, raw materials, metallic minerals, food grains etc. Can be transported at ease.
3. Why is there a difference in the Climate of regions close to the oceans and regions far away from the Oceans?
Ans.: A difference in the Climate of regions close to the oceans and regions far away from the Oceans because in the regions close to the Oceans seas or large reservoirs, there is not much of a difference in the temperature thorough out the day. The main reason for it is the mixing of vapour released through evaporation of water from these water bodies in to air. This vapour in the air absorbs and stores the heat released from land.Hence the temperature in coastal areas remains equable.
On the continental region due to lack of vapour there we see different temperature.
4. Which continents are located along the coast of Pacific Ocean?
Ans.: The continents of North America South America, Asia and Australia are located along the coast of Pacific Ocean.
Q.3. See figure 6.5 and answer the following questions.
1. What items are included in our diet? Ans.: In our diet Chapati, roti, dal rice, vegetables, idli, vada, thalipit, paratha mutton, chicken eggs etc are included.
2. Which items amongst those shown come under non-vegetarian food?
Ans.: Mutton/meat, chicken ,fish & prawns come under non - vegetarian food.
3. Which of these are prepared from aquatic creatures?
Ans: Fish, prawns are prepared from aquatic creatures.
Q.4 Answer the following.
1.What do the dead remains release in the ocean water?
Ans. The dead remains release minerals and salts in the ocean water.
2. What are added to the water during volcanic eruptions?
Ans. During volcanic eruptions different minerals, ashes, salts and gases are added to the water.
3. Which things make the ocean water salty?
Ans. The releasing of minerals and salt due to decomposition of dead remains and minerals, ashes, salts and gases from volcanic eruptions make the water salty.
4. In what term salinity is expressed?
Ans. Salinity is expressed in terms of mils (particles per thousand)
5. What is the average salinity of oceanic water?
Ans. The average salinity of oceanic water is 35°/00.
6. What is the salinity of Dead sea?
Ans. The Dead sea is known to have maximum salinity i.e. 332°/00.
7. What are Planetary Winds?
Ans. Planetary Winds are winds blow due to pressure difference in the belts.
8. What are the source of rain?
Ans. Oceans are the source of rain.
9. Which is the most economic option of transportation?
Ans: Oceans are the most economic option of transportation.
10. Which is the serious issue related to oceans.?
Ans: Pollution of oceanic waters is a major and serious issue that developed in recent times.
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