Ocean Floor and Continental Drift

The video explores the distribution of oceans and continents, focusing on Alfred Wegener's continental drift theory. It discusses the evidence supporting the theory, such as matching coastlines, fossil records, and glacial deposits. The video also covers the forces Wegener proposed for continental drift and subsequent theories like convection currents. It examines ocean floor features, including mid-ocean ridges and trenches, and introduces the concept of seafloor spreading, highlighting volcanic activity and the age of oceanic crust.

What percentage of Earth's surface is covered by continents?

• 15%

• 71%

• 50%

• 29%

Who proposed the continental drift theory in 1912?

• Alfred Wegener

• Isaac Newton

• Charles Darwin

• Arthur Holmes

What was the name of the supercontinent mentioned in the continental drift theory?

• Atlantis

• Gondwanaland

• Laurasia

• Pangaea

Which of the following is NOT evidence supporting continental drift?

• Matching coastlines

• Similar rock formations

• Identical fossils

• Presence of deserts

What force did Wegener suggest was responsible for the movement of continents?

• Wind currents

• Magnetic fields

• Tidal forces

• Gravitational pull

What theory did Arthur Holmes propose to explain the movement of continents?

• Seafloor spreading

• Convection currents

• Plate tectonics

• Volcanic activity

Which feature is NOT part of the ocean floor configuration?

• Continental margins

• Deep-sea basins

• Mid-ocean ridges

• Mountain peaks

What is the longest mountain chain on Earth, found underwater?

• Rocky Mountains

• Himalayas

• Andes

• Mid-oceanic ridges

What process explains the formation of new oceanic crust at mid-ocean ridges?

• Seafloor spreading

• Continental drift

• Subduction

• Erosion

How old are the oldest rocks found on the ocean floor?

• 3.2 billion years

• 1 billion years

• 500 million years

• 200 million years