TUGAS GEOGRAFI KELOMPOK 3 LAUT X-5

Summary

The script provides an informative explanation of various types of seas and oceans, including shallow seas, mid-ocean seas, and deep seas. It explores classifications based on their location, such as inland seas, coastal seas, and open seas. The video also discusses the processes of transgression, regression, and tectonic formation of seas. Key oceanic features, such as the continental slope, trench, and mid-ocean ridges, are explained. The script touches on tides, waves, and ocean currents, including their causes and types. Finally, it highlights Indonesia's maritime boundaries and the significance of water resources, emphasizing their economic and environmental value.

Takeaways

• 😀 Shallow seas have a depth of less than 200 meters and are commonly found around continents, like the Java Sea.
• 😀 Mid-ocean seas have depths between 200 and 1500 meters, serving as a link between shallow seas and deep oceans, such as the Banda Sea.
• 😀 Deep oceans have depths exceeding 1500 meters and are typically located in oceanic trenches, like the Mariana Trench.
• 😀 Inland seas are mostly surrounded by land, such as the Mediterranean Sea, while marginal seas are on the continental edge, connected to the ocean, like the South China Sea.
• 😀 Open seas are located in the middle of oceans and do not border land, with the Pacific Ocean being a key example.
• 😀 Transgression seas are formed when rising sea levels submerge low-lying land, like the Arafura Sea.
• 😀 Regression seas are created when sea levels fall or land rises, leading to the re-exposure of previously submerged land.
• 😀 Tectonic seas are formed due to tectonic activities like earthquakes or fault movements, such as the Banda Sea.
• 😀 Continental shelves are shallow sea areas that are flat and located at the meeting point of land and deeper seas.
• 😀 Waves, tides, and ocean currents are influenced by factors like wind, the Earth's rotation, and gravitational forces from the moon and sun, affecting various marine phenomena.

Q & A

What are the three types of seas classified by depth?

The three types of seas classified by depth are: shallow seas (depth less than 200m), mid-depth seas (depth between 200m and 1500m), and deep seas (depth greater than 1500m).

Can you provide an example of each type of sea?

An example of a shallow sea is the Java Sea, a mid-depth sea is the Banda Sea, and a deep sea is the Mariana Trench.

What are the three types of seas classified by their location?

The three types of seas by location are: inland seas (surrounded mostly by land), coastal seas (located at the edges of continents and connected to oceans), and free seas (found in the open ocean without direct contact with land).

How does the transgression process occur?

Transgression occurs when the sea level rises, covering low-lying land. This typically happens when ice ages melt, increasing the volume of seawater.

What causes a regression of the sea?

Regression happens when the sea level drops, or the land rises, causing the sea to retreat and expose previously submerged areas.

What is the significance of tectonic seas?

Tectonic seas are formed due to tectonic activity, such as the movement of Earth's plates, which causes the formation of seas like the Banda Sea.

What are some key features of the continental shelf?

The continental shelf is a shallow, flat area found where the land meets the ocean, typically characterized by a depth of 200 meters or less.

What is a 'trench' in terms of seabed morphology?

A trench is a deep, narrow depression in the ocean floor, often found at the meeting point of oceanic and continental plates, such as the Mariana Trench.

What factors contribute to tides in the ocean?

Tides are primarily caused by the gravitational forces of the Moon and the Sun, with the Moon having a stronger influence due to its proximity to Earth. The Earth's rotation and the alignment of these celestial bodies also play key roles in tide formation.

What are some of the main causes of ocean waves?

The main causes of ocean waves include wind, underwater earthquakes (which can lead to tsunamis), volcanic activity, and underwater landslides.

How are ocean currents formed?

Ocean currents are created by wind, temperature and salinity differences in water, the Earth's rotation (Coriolis effect), and tidal forces caused by the Moon and the Sun.

What are the three types of maritime boundaries as defined by international law?

The three types of maritime boundaries are: territorial seas (12 nautical miles from the baseline of a country), continental shelf (up to 200 nautical miles from the baseline), and exclusive economic zones (up to 200 nautical miles from the baseline, where a country has rights to explore and use marine resources).

What are the primary economic uses of marine areas in Indonesia?

Marine areas in Indonesia are used for aquaculture (e.g., shrimp, fish farming), tourism (e.g., beach resorts, diving), and offshore mining (e.g., oil, gas extraction).