Kekura Five Fingers (Sea of Japan). Presentation on the topic "Japanese Sea" The question of naming the sea

Sea of Japan Sea of Japan sea composed of Pacific Ocean, separated from it Japanese islands and Sakhalin Island. It washes the shores of Russia, Korea and Japan. The Sea of Japan is a sea in the Pacific Ocean, separated from it by the Japanese Islands and Sakhalin Island. It washes the shores of Russia, Korea and Japan. Sea of the Pacific Ocean Japanese islands Sakhalin Russia Korea Japan Sea of the Pacific Ocean Japanese islands Sakhalin Russia Korea Japan The northern part of the sea freezes in winter. The northern part of the sea freezes in winter.

QUESTION OF NAME OF THE SEA IN South Korea The Sea of Japan is called the "East Sea" (kor.), and in North Korea the East Sea (kor.). The Korean side claims that the name "Sea of Japan" was imposed on the world community by the Japanese Empire. The Japanese side, in turn, shows that the name "Sea of Japan" is found on most maps and is generally accepted.

Flora and fauna Off the coast Far East there is a mixture of warm-water and temperate fauna. Here you can meet octopuses and squids typical representatives warm seas. At the same time, vertical walls overgrown with sea anemones, gardens of brown kelp algae, all this resembles the landscapes of Bely and Barents Sea. Great abundance in the Sea of Japan starfish and sea urchins, of various colors and sizes, there are brittle stars, shrimps, small crabs ( king crabs here they are found only in May, and then they go further into the sea). Bright red sea squirts live on rocks and stones. Of the mollusks, scallops are the most common. Of the fish, blennies are often found, sea ruffs. Off the coast of the Far East, a mixture of warm-water and temperate fauna occurs. Here you can meet octopuses and squids, typical representatives of warm seas. At the same time, vertical walls covered with anemones, gardens of brown kelp algae, all this reminds of the landscapes of the White and Barents Seas. In the Sea of Japan, there is a huge abundance of starfish and sea urchins, of various colors and different sizes, there are brittle stars, shrimps, small crabs (King crabs are found here only in May, and then they go further into the sea). Bright red sea squirts live on rocks and stones. Of the mollusks, scallops are the most common. Of the fish, blennies and sea ruffs are often found.

ICE CONDITIONS In the Sea of Japan, the ice cover reaches its maximum development in mid-February. On average, 52% of the area of the Tatar Strait and 56% of the Peter the Great Bay are covered with ice. The melting of ice begins in the first half of March. In mid-March, the open waters of Peter the Great Bay and the entire seaside coast to Cape Zolotoy are cleared of ice. The boundary of the ice cover in the Tatar Strait recedes to the northwest, and in the eastern part of the strait, ice is being cleared at this time.

The parameters of the waves depend on the strength of the wind and its duration, on the nature of the underwater coastal

The nature of the orbits of wave particles in a wave of shallow water

Scheme of wave refraction for flat (A) and bay

When interacting with the coast, wave motions contribute to the formation of wave

Transverse movement of sediments

The set of neutral points on the underwater slope is called the neutral line.

The movement of sea water. The main factor in the formation of the relief and the processes of sediment movement in the coastal

9.2. Coastal elements. The coastline is usually called the line of intersection of the surface of the sea (ocean, lake

Coastline (coast line) - the line along which the horizontal water surface of the sea (or

The scheme of the structure of the coast

Coast - a strip of land adjacent to the coastline, the relief of which is formed by the sea when

The strip of seabed adjacent to the shore and

flat coast with

9.3. Abrasion type of coast. The most intensive destruction occurs near the coast, near which the bottom

With further destruction, the coastal cliff is moved towards the land. At the same time, the waves destroy and

Kekura Five Fingers (Sea of Japan)

The clastic material carried away from the beach to the underwater slope is crushed, abraded during movement,

9.4. Accumulative forms of the coastal zone. For shallow shores with a gentle slope of the bottom, in

The accumulation of sediments in the area of action of the surf flow is called a beach. Beach - elementary accumulative

Partial profile beach (A) and coastal shaft (B) - full profile beach (according to

Coastal ramparts. Full profile beach with coastal bar during the attenuation of storm waves

The coastal bar is formed in those cases when the surf current is much stronger than the reverse and

Larger accumulative formations, the origin of which

Stages of coastal bar development in plan (a, b, c) and in section (I-II,

Typical examples of a coastal bar are the Arabat Spit on the western coast of the Sea of Azov.

9.5. Accumulative forms formed during the longitudinal movement of sediments. When the waves come under

Formation of elementary accumulative forms during the longitudinal movement of sediments. I - when filling the incoming

1. Filling in the incoming corner of the bank. The coastline turns sharply towards the sea (Fig.

Spit of the Sea of Azov

3.External shore blocking. In case of blocking the coast by an island, shoal or headland (Fig. III)

4. Total energy drop of the wave field in bays. In narrow and long bays

Coasts with a heavily indented coastline (with a quick sink under sea level,

The most important geomorphological results of the activity of the sea are: 1) the formation of surface marine abrasion terraces formed

9.6. Types of initial dismemberment of the coastline. In addition to the geological structure of coastal areas, the magnitude of the slope

1. Fjord coasts, formed as a result of flooding of glacial valleys of coastal mountainous countries. They are

Ingressive coasts - the result of the flooding of coastal land by the sea

The coasts of the Aral type are formed when the eolian relief is flooded by the sea, when above sea level

On the shores of some seas, tides play a significant role in the development of the relief of the coastline.

Classification and types of sea coasts:

In the mangrove shores, forest thickets of mangroves, trapping sand and silt particles brought by rivers

Coral coasts and islands

Sea terraces. Since the level of the World Ocean in the Quaternary due to changes in glacial and

Sea terrace. Sakhalin.

In each terrace, elements such as

. Types of sea terraces: A

All this makes us look for ways to protect the coast from destruction. There are many ways to protect

Kekura Five Fingers (Sea of Japan)

The clastic material carried away from the beach to the underwater slope is crushed, abraded, rolled, and sorted during movement. Larger material. moves to the shore in a direct wave moving at a higher speed than the reverse one, which carries away thinner material beyond the lower edge of the bench. Here, the formation of an underwater accumulative leaning terrace begins, the sloping surface of which, in the process of its development, directly continues the surface of the abrasion terrace. The process of abrasion and retreat of the coast gradually slows down due to the increase in the shallow water zone due to the expansion of the abrasion and accumulation terraces. The profile of the coastal zone approaches the state of the abrasion equilibrium profile, in which at any point of the coastal profile, neither abrasion nor accumulation of material occurs.

9.4. Accumulative forms of the coastal zone . Shallow shores with a gentle bottom slope, in contrast to deep, intensely eroded shores, are characterized by the accumulation of detrital material and the formation of accumulative forms. Marine sediments formed in the coastal zone in shallow water conditions -coastalsediments are very mobile. If the waves are directed at right angles to the shore, the marine sediments will experience transverse movement, and if the waves approach at an oblique angle, the sediments will move longitudinally along the coast. Most often, waves approach the shore at a certain angle, so both types of movement occur simultaneously. As a result various types the movement of clastic material forms a variety of accumulative landforms of the coast.

The most characteristic forms of accumulative types

banks during the transverse movement of sediments are

beaches, underwater and coastal bars and coastal bars.

Sediment accumulation in the surf flow zone called the beach. The beach is an elementary accumulative form within the coastal zone of the sea. The beach is usually composed of larger sediments than the underwater coastal slope. Owing to the fact that maximum speeds direct flow is reached by it at the beginning of its movement, near the wave breaking zone, it is here that the largest detrital material accumulates. Further up the beach, the size of sediments naturally decreases.

By morphological features allocate beaches of a full and incomplete profile.

Full profile beach is formed if there is enough free space ahead of the sediment accumulation that is being formed. Then the beach takes the form of a coastal rampart, most often with a sloping and wide sea slope and a short and steeper slope facing the coast.

If the beach is formed at the foot of the ledge, then a leaning beach, or beach of an incomplete profile, with one slope facing the sea.

Partial profile beach (A) and coastal ridge (B) - full profile beach (according to V.V. Longinov):

1 - bedrock: 2 - beach deposits

Coastal ramparts. A beach with a full profile with a coastal swell during the attenuation of storm waves is complicated by smaller swells that form on its frontal slope. In a strong storm, small ramparts are destroyed, and the material composing them is partially carried away to the underwater slope, partially thrown over the crest of the rampart to the rear slope, increasing the height of the rampart and moving it towards the land. With a significant height of a large coastal swell, the latter may already be beyond the influence of waves, then a new, younger large coastal swell will form at the base of its sea slope. In the process of formation of accumulative-type coasts, a number of ancient coastal ridges may thus arise, which will eventually lead to the growth of the coast and its advance towards the sea. The structure and location of the coastal ridges allows us to restore the history of the formation of the coast, the position of the ancient coastlines.

stretch for tens - hundreds of kilometers along the rugged low-lying sea coasts and usually separate the coastal water area - the lagoon from the sea. The feet of many bars are located at depths of 10-20 m, and they rise 5-7 m above the water. Bars are very widespread: 10% of the entire length

The coastline of the World Ocean falls on the shores bordered by bars. The bar development scheme is shown in fig. The emerging underwater bar eventually turns into an island bar, and then, as a result of its attachment to the shore, it becomes a coastal bar.

The coastal bar in its development sequentially goes through three stages - underwater, island and coastal; according to this differ

underwater, island and coastal bars. The underwater bar is formed entirely due to bottom waters, while the wave-surf flow participates in the formation of the island and coastal bars. The island bar rises above the water, but unlike the coastal bar, it does not connect to the shore at any point.

Stages of coastal bar development in plan (a, b, c) and in section(I-II, III-IV, V-VI). a-underwater, b-island, c- coastal

Typical examples of a coastal bar are the Arabat Spit on the west coast. Sea of Azov. the greatest length (200 km). Arabat Spit separating the Sivash lagoon from the Sea of Azov.

, Extracurricular work , Ecology, Competition "Presentation for the lesson"

Class: 8

Presentation for the lesson

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Target: to form students' knowledge about the size and geographical position of the Sea of Japan, about the hypotheses of the origin of the Sea of Japan, about the nature of the Sea of Japan

Equipment: multimedia, computer presentation, atlas maps, textbook Geography of Primorsky Krai.

During the classes

1. Organizational moment

2. Learning new material (see presentation)

Slides 1-2

(Introductory speech of the teacher)

Plan

1. Dimensions and geographical position Sea of Japan.

2. Hypotheses about the origin of the Sea of Japan.

3. The nature of the coastline of Primorye.

4. Properties of water masses.

5. Inhabitants of the Sea of Japan.

Task: Analyze atlas maps and find out the size of the Sea of Japan slide 3.5

Student's report on the hypotheses of the origin of the Sea of Japan slide 4.

Slide 6. In the Sea of Japan, surge water movements are observed, which have an annual period of fluctuations. Severe storms at sea are associated with cyclones, which can be divided into two types:

tropical (oceanic origin) - typhoons;
continental (from the interior regions of Asia). The salinity of the sea is 34%.

Task: Analyze the map on page 10 of the textbook.

Slides 7-16 Students' messages about the organic world of the Sea of Japan.

Question: Which economic importance for a person has the Sea of Japan? For residents of Primorsky Krai?

3. Fixing test slides 17-18.

Continue suggestions:

I don't hall that...
I was surprised that...
I'm proud that...
I found out that...

3. Homework: paragraph 2, work in k / k.

Sources:

1. Geography of Primorsky Krai. Grades 8-9: Textbook for educational institutions general secondary education. /Baklanov et al. Vladivostok 2000.

2. V.V. Tomchenko. Tests, questions and assignments in the geography of Primorsky Krai. Toolkit. Vladivostok 1998.

3. Kakorina G.A., Udalova I.K. Teaching the course "Geography of the Primorsky Territory". Guidelines. - Vladivostok: Dalnauka. 1997.

slide 2

The Sea of Japan is a sea in the Pacific Ocean, separated from it by the Japanese Islands and Sakhalin Island. It washes the shores of Russia, Korea and Japan.

The northern part of the sea freezes in winter.

slide 3

Area and depth of the Sea of Japan

The area is 1.062 million square kilometers. The greatest depth is 3742 m. The northern part of the sea freezes in winter.

slide 4

Sea naming question

In South Korea, the Sea of Japan is called the "East Sea" (Korean 동해), and in North Korea it is called the East Sea of Korea (Korean 조선동해). The Korean side claims that the name "Sea of Japan" was imposed on the world community by the Japanese Empire. The Japanese side, in turn, shows that the name "Sea of Japan" is found on most maps and is generally accepted.

slide 5

slide 6

Slide 7

Flora and fauna

Off the coast of the Far East, a mixture of warm-water and temperate fauna occurs. Here you can meet octopuses and squids - typical representatives of warm seas. At the same time, vertical walls covered with sea anemones, gardens of brown algae - kelp - all this resembles the landscapes of the White and Barents Seas. In the Sea of Japan, there is a huge abundance of starfish and sea urchins, of various colors and different sizes, there are brittle stars, shrimps, small crabs (King crabs are found here only in May, and then they go further into the sea). Bright red sea squirts live on rocks and stones. Of the mollusks, scallops are the most common. Of the fish, blennies and sea ruffs are often found.

Slide 8

Flora and fauna

Slide 9

Slide 10

Main ports

Vladivostok, Nakhodka, Vostochny, Sovetskaya Gavan, Vanino, Aleksandrovsk-Sakhalinsky, Kholmsk, Niigata, Tsuruga, Maizuru, Wonsan, Hyungnam, Chongjin, Busan.

slide 11

Economic use

Fishing; extraction of crabs, trepangs, algae.
Sea transport
Fisheries and mariculture
Recreation and tourism

slide 1

Japanese Sea

Prepared by Kuskova Anastasia

slide 2

The Sea of Japan is a sea in the Pacific Ocean, separated from it by the Japanese Islands and Sakhalin Island. It washes the shores of Russia, Korea and Japan. The northern part of the sea freezes in winter.

slide 3

The area is 1.062 million square kilometers. The greatest depth is 3742 m. The northern part of the sea freezes in winter.

slide 4

QUESTION OF NAME OF THE SEA

Slide 7

Flora and fauna

Slide 10

Main ports

Vladivostok, Nakhodka, Vostochny, Sovetskaya Gavan, Vanino, Aleksandrovsk-Sakhalinsky, Kholmsk, Niigata, Tsuruga, Maizuru, Wonsan, Hyungnam, Chongjin, Busan.