Sea-Floor Spreading

What is Sea-Floor Spreading?

• Mid-Ocean ridges continually add new material to the ocean floor.
• The moon
• A thing in the Ocean
• Mid-Ocean trenches continually add new material to the ocean floor.

Mid-Ocean ridges form long chains of "______" that rise up from the ocean floor.

• Rivers
• Valleys
• Mountains
• Rocks

In the Mid-1900s, scientists mapped mid-ocean ridges using what?

• Satellites
• Moons
• Stars
• Sonars

What form the longest mountain ranges on the earth?

• Ridges
• Mountains
• Rivers
• Plateaus 

What is Subduction?

• The Process of how stars are made.
• The process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle again.
• True
• False

In a process taking tens of millions of years, part of the ocean floor sinks back into the mantle at deep-ocean trenches.

• False
• True

Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge

• True
• False

Sea floor spreading occurs at the divergent plate boundaries.

• False
• True
• Very False
• Really this is boring

Seafloor spreading is consistent at all mid-ocean ridges. 

• True
• False

Seafloor spreading is a geologic process in which type of plates split apart from each other?

• Dirt
• Tree
• Tectonic
• Dinner