Oceanography Concepts and Measurements

The video tutorial covers the revised NFS 2022 syllabus for Class 8 Geography, focusing on the hydrosphere. It includes fill-in-the-blank exercises, Q&A on the hydrosphere, differences between spring and neap tides, methods for ocean conservation, and matching exercises. Key terms are defined, and viewers are encouraged to subscribe for more educational content.

What is the average depth of the continental shelf?

• 50 fathoms

• 200 fathoms

• 100 fathoms

• 150 fathoms

How many feet are in one fathom?

• 9 feet

• 3 feet

• 12 feet

• 6 feet

Which is the deepest place in the Pacific Ocean?

• Challenger Deep

• Java Trench

• Tonga Trench

• Mariana Trench

What percentage of the Earth's surface is covered by water?

• 71%

• 60%

• 50%

• 80%

Which of the following is NOT a major part of the ocean floor?

• Deep Sea Plain

• Ocean Ridge

• Continental Slope

• Continental Shelf

What causes tides?

• Wind

• Volcanic activity

• Gravitational forces

• Earthquakes

Which method is NOT recommended for ocean conservation?

• Controlling mineral exploitation

• Dumping nuclear waste into the ocean

• Avoiding effluent dumping by coastal industries

• Transporting oil through pipelines

Which current is a cold current in the South Atlantic Ocean?

• Agulhas Current

• Benguela Current

• Oyashio

• Gulf Stream

What is the average salinity of ocean water?

• 25 ppt

• 30 ppt

• 40 ppt

• 35 ppt

What is the primary benefit of tides?

• They increase ocean salinity

• They help in the entry of large ships to harbors

• They decrease ocean temperature

• They prevent ocean currents