Sea's Knowledge

Understanding Sea, Sea species, Taste and salt content in the sea water, and Measurement Techniques depths of the sea, now that's what I will share in this night pal. The science of the oceans, which goes into the label in softilmu.blogspot.com geography. May be useful for my friend all ... 

A. UNDERSTANDING THE SEA 

Is a collection of salty sea water very much and widespread in the earth's surface that separates or connects a continent to other continents and an island with other islands. 

B. SEA 

1 Sense of Sea Water 

Maybe when we discuss about the sea, still a lot of buddies who wondered why sea water is salty. Now let's discuss the answer immediately wrote. 

Actually the taste of sea water coming from the mainland, like this chronology. In the event of rain on the land, the water will seep into the ground and little by little will come out again through the rivers and eventually reach the sea. Well on the way towards the sea, the water from the mainland also carries minerals, so the sea filled with mineral salts. 

We know the sea has a surface which is so large that it is becoming one of the evaporation factor in a large number, when sea water evaporates, which is just vaporized water (H2O) while the mineral salts remain with sea water, so that sea water tastes salty . Levels of salinity of sea water is influenced by the temperature, the more heat is usually the area, the salty seawater. 

After reading the above questions, maybe my friend has to know the reason why the sea tastes salty, but again the question arises: Why is sea water salty taste is not that when the water is also coming from the mainland? 

Well the answer is because the water level of the lake is not large enough so that evaporation is not so great, that the water that evaporates with the water coming into the lake is still balanced and mineral resources are very limited, unlike sea mineral sources from around the world into one. 

2 Salt Content In Sea Water 

Seawater has an average salinity of 3.5%. This means that in 1 liter (1000 ml) contained 35 sea salt (mainly, but not entirely, a common salt (NaCl). 

Although most of the sea water in the world has about 3.5% salinity of sea water is also different salt content. Most freshwater is in the eastern Gulf of Finland and in the northern Gulf of Bothania, both part of the Baltic sea. The most salt is in the Red Sea, where high temperatures and limited circulation makes high evaporation and little input of water from the rivers. Salt levels in some lakes can be even higher. 

Sea water has a salt content because the earth is filled with the mineral salts contained in rocks and soil. For example, sodium, potassium, and calcium, etc.. If the river water flows into the ocean, the water carries salts. Ocean waves hitting the shore can also produce salt that there exist at the cobblestones. Eventually becoming salty as sea water contains a lot of salt. 

C. TYPES OF SEA 

1 According to the Occurrence Process 

There are several types of sea on earth, and according to the process we know of the existence of Sea transgression, Ingresi Sea, and the Sea of ​​regression. 

a. marine transgression 

Sea is a marine transgression that occurred because of changes in sea level are positive (widespread). The surface changes occur due to rising sea levels or the land is falling, so that parts of the lower mainland inundation. These changes occurred during the Ice Age. Examples of this kind of sea is the Java Sea, Arafura Sea, and the North Sea. 

b. sea ​​Ingresi 

Ingresi Sea is a sea that is due to the penurnan land on the sea floor. Hence it is often called sea sea ground down. Land subsidence in the seabed will form the bottom of the sea and ocean trenches. The bottom of the sea or basin is a decrease in the seabed that is round. For example the bottom of the Sulu Sulawesi Lubuk, and Lubuk Caribbean. While Trench Marine or Trog is a decrease in the seabed elongated shape. For example, the Mindanao Trench which 1,085 m, which is inside the Sunda Trench 7,450 m, and 10 683-deep Mariana Trench (the deepest in the world). 

c. Regression sea 

Regression sea is the sea which narrowed. Narrowing is due to the deposition of the rocks (sand, mud, etc.) carried by the rivers that flow into the sea. Many marine narrowing occurred on the north coast of the island of Java. 

2 According to It 

Based on its location, Sea can be divided into three, namely Marine Bank, Middle Sea, and the Inland Sea. 

a. marine Bank 

Marine Bank is located on the edge of the ocean continents (continental) and as if separated from the ocean by land islands or peninsula. Examples are separated by the South China Sea islands of Indonesia and the Philippine Islands 

b. Mid sea 

Mid Sea is the sea which lies between the continents. In the sea and has a cluster of islands. Examples Sea between the middle of the African continent-Asia and Europe. 

c. Inland Sea 

Inland sea is the sea-sea almost entirely surrounded by land. For example the Black Sea. 

3 In Depth 

In this category are distinguished by four marine regions (zones), namely Lithoral Zone, Zone neritic, bathyal zone, and Zone Abysal. 

a. zone Lithoral 

This zone is the shore or coastal region. In this region when the tide will be under water, and at low tide changed into the mainland. Therefore, this region is often also called the tidal region. 

b. neritic zone 

Neritic zone is the boundary line of the intertidal zone to a depth of 150 m. In this zone can still be penetrated by sunlight so in this region the most abundant variety of genius, both animal and plant life. 

c. bathyal zone 

Bathyal zone is the area of ​​sea which has a depth of between 150 to 1800 m. This region can not be pierced by sunlight, therefore the life of the organism is not as much as there is in the neritic region. 

d. zone Abysal 

Abysal zone is a region of the sea has a depth of over 1800 m. In this region the temperature is very cold and there is no vegetation. Types of animals that can live in this region is very limited. 

D. MARINE DEPTH MEASUREMENT 

There are two ways you can ditem [uh to measure the depth of the sea, using the techniques of lead pendulum (dradloading) and Echo or Echo Sounder techniques or Echoloading. 

1 Technical Lead Pendulum (Dradloading) 

Dradloading 

This technique reached by using a long rope tied to the pendulum tip lead as ballast. Of a boat rope lowered until the pendulum touches the seabed. Furthermore, the cord length is measured and that the depth of the sea. Search is actually not quite correct because the rope could not perpendicular due to the influence of ocean currents. In addition, sometimes the pendulum does not get to the bottom of the sea because of jam rock. It also takes a long time. However, this method has the advantage of knowing the type of rock on the ocean floor, the temperature, and also find out if the sea floor there are organisms that can live. 

2 Gema Duga (Echoloading) 

Echoloading 

The use of this technique is based on physical laws of propagation and reflection of sound in water. The sound signal is issued from a piece of equipment that is installed in the bottom of the ship has average speed of creep-rata1600 m / s to hit the ocean floor. After hitting the sea floor in the form of sound reflected echoes and captured through a piece of equipment that is also mounted in the bottom of the vessel, the time required for the propagation and reflection can be translated as the depth of the sea. This method is considered more practical, fast, and accurate. But we can not obtain on the temperature, the type of rock, and the signs of life on the sea floor.