Understanding Ocean and Sea Concepts

The video tutorial explains the differences between oceans and seas, highlighting their size and separation by island chains or ridges. It describes the sea bed's features, including valleys and mountain ranges, and its continuous changes due to tectonic activity. The formation of waves is attributed to wind and water interaction, with different wind strengths creating varying wave types. Finally, the video discusses how salt is formed in the sea through the washing away of minerals from soil and rocks, and how the salt content is balanced by marine life.

What distinguishes oceans from seas in terms of size and separation?

• Oceans are smaller and separated by rivers.

• Seas are larger and separated by continents.

• Seas are larger and separated by tectonic plates.

• Oceans are larger and seas are separated by island chains or ridges.

Which of the following is NOT a bordering sea?

• Pacific Ocean

• Baltic Sea

• North Sea

• Mediterranean Sea

What technology helps us understand the topography of the seabed?

• Radar technology

• Sound wave technology

• Satellite imaging

• Infrared scanning

What is a common feature of flat seas like coral reefs?

• They are densely populated with plants and animals.

• They are covered with ice.

• They are sparsely populated with marine life.

• They have high mountain ranges.

How are waves primarily formed?

• By the movement of tectonic plates.

• By the gravitational pull of the moon.

• By the friction between water and wind.

• By underwater volcanic activity.

What type of waves are created by a constant wind?

• Storm surges

• Tsunamis

• Groundswell

• Tidal waves

What happens to the salt when rainwater seeps into the ground?

• It evaporates into the atmosphere.

• It is absorbed by plants.

• It is carried into rivers and eventually the sea.

• It forms crystals on the ground.

Why doesn't the sea become overly salty despite continuous salt deposits?

• Salt is constantly evaporating.

• Salt is absorbed by marine life.

• Salt is filtered by underwater plants.

• Salt is diluted by fresh water.

What is the average salt content in sea water?

• 1 gram per liter

• 10 grams per liter

• 35 grams per liter

• 50 grams per liter

What happens to marine organisms after they die in the sea?

• They float to the surface.

• They dissolve in the water.

• They sink to the seabed and decompose into sediments.

• They are eaten by predators.