Exploring the Ocean Floor and Continental Drift

The video explores the history of ocean floor mapping, highlighting Marie Tharp's pivotal role in transforming our understanding of the seafloor. Despite initial skepticism, Tharp's work with sonar data led to the discovery of the Mid-Atlantic Ridge, providing evidence for continental drift and challenging the expanding Earth theory. Her detailed maps and insights into tectonic activity have significantly advanced geological science. The video concludes by encouraging further exploration of Earth's structure.

What percentage of the ocean floor had been mapped in detail by 2017?

• 26%

• 16%

• 36%

• 6%

What was Marie Tharp's initial role at the Lamont-Derrity Earth Observatory?

• Collecting sonar data

• Drafting and computing for graduate students

• Mapping earthquake epicenters

• Sailing on research vessels

What technology did Tharp use to map the ocean floor?

• Sonar

• Underwater drones

• Satellite imaging

• Sounding

What significant geological feature did Tharp discover in the North Atlantic Ocean?

• A volcanic island

• A coral reef

• A rift valley

• A deep trench

What theory did Tharp's discovery of the rift valley challenge?

• Plate tectonics

• Expanding Earth

• Continental drift

• Seafloor spreading

What did Tharp's colleague initially call her idea about the rift valley?

• Groundbreaking

• Nonsense

• Girl talk

• Revolutionary

What additional evidence supported Tharp's rift valley discovery?

• Ocean currents

• Tsunami patterns

• Earthquake epicenters

• Volcanic eruptions

What is the Mid-Atlantic Ridge known for today?

• Having the deepest ocean trench

• Being a major shipping route

• Hosting diverse marine life

• Being a site of tectonic plate separation

What did Tharp's work help to explain about the continents?

• Their biodiversity

• Their past connections

• Their geological age

• Their current climate

Until what year did Marie Tharp continue her study of the ocean floor?

• 2016

• 2006

• 1996

• 1986