## AP State Syllabus 7th Class Social Important Questions 4th Lesson Oceans and Fishing

Question 1.
Fishing with the mechanical boat is risky than the Karratheppa. Why?
Compared to the Karrateppa, there is far more risk of life in Marapadava (Mechanised boat) because it goes far into the sea and it is difficult to swim over to shore in times of trouble.
What is worse, there is no first aid in the big boats, nor any life jacket. Fishing is a risky and brave occupation.

Question 2.
Study the table given below and answer the following questions.
Distribution of Fresh Water on Earth

 Sl.No. Source Percentage 1 Ice caps and Glaciers 68.7% 2 Groundwater 30.1% 3 Surface water (lakes, swamps, rivers) 0.3% 4 Others 0.9%

a) Where do we have the highest percentage of fresh water on the Earth?
Ice caps and Glaciers.

b) Give any two sources of surface water.
Lakes, swamps, rivers, etc.

Question 3.
Read the info chart given below and answer questions a and b.

a) Where is the most fresh water on the earth found?
More fresh water on the earth is found in Icecaps & Glaciers.

b) What percentage of the freshwater is accessible?
Accessible surface freshwater is 1%.

Question 4.
“The lives of fishermen are risky and troublesome” – Comment in your own words.
I agree with the above statement.

1. Most of the Fishermen do not own mechanical boats. They depend on others boats and go fishing.
2. Always they are taking money from middlemen for diesel and kit expenses.
3. Again they sell the day’s catch of fish to the middlemen at the rate he fixes.
4. They don’t have any profits.
5. There is no First Aid in the big boats nor any life jacket.

Their life is risky and troublesome. While they go fishing, if any cyclone hits that area, they are not able to reach the coast of the ocean.

Question 5.
What is an ocean? Name the oceans in the world.
The vast body of salt water that covers a considerable portion of the earth’s crust is called the ocean. There are three major oceans in the world. They are the Pacific, the Atlantic, and the Indian ocean. Apart from these three, waters of the Arctic and Antarctic are also described as oceans.

Question 6.
What are the two types of ocean currents? Give examples.
Ocean currents are of two types. They are:
1) Warm currents: They flow from the equator towards poleward regions.
Eg: The Gulf stream and the Atlantic drift.
2) Cold currents: They flow from poleward regions towards the equator.
Eg: The Labrador current, The Greenland current.

Question 7.
What are high tides and low tides?
High tide: The bulge of seawater is high tide.
Low tide: The level of the seawater reduces. It is low tide.
High tides and low tides occur twice each day.

Question 8.
Explain the different types of nets.
Nets are of different types based on different sizes of the Kannulu (Rings) and the layers of the net. Recently a net known as Ring Net which helps in getting a better catch is being increasingly used by the fishermen. This has helped to reduce migration from the village. Earlier there were nets made up of cotton thread. Now cotton nets have almost been replaced by plastic, nylon and other synthetic, materials. A net lasts for 4 – 5 years. Nets are purchased by weight and the type of rings they contain. Nets cost around Rs. 250-300 per kg. Ring nets weigh around 500 kgs.

Question 9.
What enables the middlemen in the fish business to earn much more money than the fishermen?
Some middlemen temporarily store the fish, segregate them and carry them in cold container tanks to faraway places like Kolkata, Bangalore, Chennai, Hyderabad, Kerala, and so on. These people get four times more money than the catcher does. They also provide advances for the fishermen with interest. Fishermen have no option to sell the day’s catch of fish to the middlemen at the rate they choose to fix. Thus middlemen earn more money than fishermen.

Question 10.
Is the water found in your village/town saline or potable? Is it different in different parts of the village/town?
In our city, Vijayawada both saline and potable waters are found. The water supplied by Corporation is potable water. In many areas, people use bore pumps for domestic purposes. Of these, some are saline and some are potable.

Question 11.
What are the names you use for different water bodies? Do large or small water¬bodies have different names?
Oceans, seas, rivers, lakes, ponds, waterfalls, canals, streams, and tanks are the names of different water bodies. All water bodies have different names.

Question 12.
How many meters deep are the water bodies you have seen?
I have seen the Bay of Bengal, the Arabian Sea, and the Indian ocean at Kanya Kumari in Tamil Nadu the southernmost tip of India. The depth of the Bay of Bengal is 4,694 m, the Arabian sea is 4,652 m and the Indian ocean is 8,047 m.

Question 13.
Please share what you have seen or felt about what lies under the surface of water bodies.
There will be many sea animals and many kinds of landforms under the surface of water bodies.

Question 14.
Look at the image of Bhavanapadu village and find the following.

i) Identify the water bodies in the image.
ii) Identify the land that is used for activities other than agriculture in this village.
If so, for what purpose?

Question 15.
Tata Rao owns this boat which he purchased from Markonda in Odisha. It cost him around Rs. 6 lakhs. He borrowed the money from private moneylenders at a high rate of interest. He couldn’t get a bank loan, as he had no fixed assets. Even for daily fishing expenses, he has to get advances from middlemen. He has to invest a minimum of Rupees. 5,000/- per trip for diesel, wages, and other things. Because he has borrowed money from the middleman, Tata Rao has to sell the day’s catch of fish to the middleman at the rate he fixes. By this time the boat is ready for sale and all the twenty members are on the boat. They go up to 15-20 kilometers in the sea.
a. Where did Tata Rao purchase the boat?
Tata Rao purchased the boat from Markonda in Odisha.

b. Why could he not get a bank loan?
Because he had no fixed assets.

c. Where did he get advance?
From Middlemen.

d. How much money did he invest?
He invested Rs. 6 lakhs and a minimum of Rs. 5000/- per trip for diesel, wages, and other things.

e. Did he have any other option to sell his day’s catch-offish to anyone at a high rate?
No. He had no option but to sell the day’s catch of fish to the middleman.

Question 16.
For what purpose are thermocol boxes shown in the photo lined up in the middleman’s add?

Some middlemen temporarily store the fish, segregate them and carry them in cold container tanks faraway places like Kolkata, Bangalore, Chennai, Hyderabad, Kerala, and so on.
Their people store the fish in pheromonal boxes so that they won’t get damaged and middlemen store them for many days.

Question 17.
Write the different crops cultivated in Bhavanapadu village.
Fishing is not the only occupation of the people in Bhavanapdu village. They cultivate the land to grow crops and also rear animals and birds. The village soil is mainly loamy and rice is the principal crop grown on it.
They don’t grow any commercial crops.

Question 18.
Explain about the salinity and drinking water in the village.
The water in the village is saline. If one digs up to 8 or 10 feet near the beach one can get potable water. But in summer these wells dry up. And it takes a long time for the water to fill up again. If you wait for an hour you may get another pot of water.
The government has sanctioned a protective water project that pumps water from the nearest village known as Suryamanipuram. It gave relief for some time. But cleaning of headwater tank and frequent repair of pumping motor is a hurdle.

Question 19.
In the world map or on the globe, find the names of five seas and five oceans.

Seas:

1. The Mediterranean Sea
2. the Arabian Sea
3. Red Sea
5. The Yellow Sea.

Oceans:

1. The Pacific Ocean
2. The Atlantic Ocean
3. The Indian Ocean
4. The Arctic Ocean
5. The Antarctic ocean

Question 20.
How are oceans useful to mankind?

1. Ocean water is saline. It contains several mineral salts’ dissolved in it.
2. The oceans are the main source of rainfall.
3. Oceans are storehouses of fish and other seafood.
4. They are the main source of salts.
5. Oceans provide natural highways for international trade.
6. Oceans regulate the temperature of the coastal regions.
7. Oceans are necessary for the balance of the ecological systems.
8. Pearls are found in oysters.
9. Some fish like cod and shark provide us with liver oil which is used as a tonic.
10. Oceans provide us with large quantities and a variety of marine foods such as fish, shrimp, oysters, and crabs, etc.

Question 21.
Describe the social life of the people of Bhavanapadu.