Exploring Seafloor Spreading Concepts

The video explores Earth's dramatic landscapes, focusing on underwater features like the Mariana Trench. It explains plate tectonics, detailing how tectonic plates move and interact, leading to phenomena like subduction and seafloor spreading. The video describes how new oceanic plates form at divergent boundaries and the evidence supporting seafloor spreading, such as basalt composition and temperature variations. It concludes with a recap of key concepts and encourages further exploration through activities.

What is the deepest place on Earth?

• The Mariana Trench

• The Grand Canyon

• Victoria Falls

• Mount Everest

What are the two types of tectonic plates?

• Subduction and Divergent

• Volcanic and Mountainous

• Igneous and Sedimentary

• Oceanic and Continental

What happens when a continental plate and an oceanic plate collide?

• Both plates merge together

• The continental plate slips under the oceanic plate

• The oceanic plate slips under the continental plate

• Both plates are destroyed

What is the process called when an oceanic plate is pushed under a continental plate?

• Convergence

• Subduction

• Divergence

• Seafloor spreading

What is created at divergent boundaries between oceanic plates?

• Mid-ocean ridges

• Deep-ocean trenches

• Continental mountains

• Volcanic islands

What fills the gap when oceanic plates pull apart?

• Water

• Sediment

• Air

• Magma

What type of rock is formed from the magma that rises during seafloor spreading?

• Sedimentary rock

• Metamorphic rock

• Igneous rock

• Limestone

Tags

NGSS.MS-ESS2-1

What evidence supports the theory of seafloor spreading?

• Absence of volcanic activity

• Presence of sedimentary rocks

• Warmer water temperatures near mid-ocean ridges

• Older rocks near mid-ocean ridges

Tags

NGSS.MS-ESS2-3

What forms along convergent boundaries?

• Volcanic islands

• Deep-ocean trenches

• Mid-ocean ridges

• Continental mountains

Tags

NGSS.MS-ESS2-2

What is the temperature of the upper parts of the mantle?

• 2000 degrees Fahrenheit

• 1500 degrees Fahrenheit

• 1000 degrees Fahrenheit

• 500 degrees Fahrenheit

Tags

NGSS.MS-PS3-4