Seafloor Spread & Subduction Quiz

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Test your ocean floor knowledge.

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Mimi T

United States

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Froggy Jumps Seafloor Spread & Subduction QuizOnline version Test your ocean floor knowledge. by Mimi T 1 What tool did scientists use to map the ocean floor? a Lidar b SONAR c Radar 2 What forms the longest mountain range on Earth? a Continental mountains b Mid-ocean ridges c Undersea trenches 3 What is sea-floor spreading? a Subduction of crust b New oceanic crust forms at ridges c Erosion of coastlines 4 Where does subduction occur? a At mid-ocean ridges b Along coastlines c At a deep-ocean trench 5 What happens to older crust as new crust forms at ridges? a It rises to the surface b It moves away from the ridge and sinks later c It stays stationary 6 What is a deep-ocean trench? a A mountain peak under water b A shallow coral reef c A valley where crust sinks into the mantle 7 How does crust move in the ‘conveyor belt’ analogy? a Remains fixed and heats up b Sinks at ridges and rises at trenches c Spreads at ridges and sinks at trenches 8 What causes new crust to form at mid-ocean ridges? a Hot magma rising and cooling at the ridge b Sediment deposition c Tidal erosion 9 What happens to older crust as it moves away from a ridge? a It floats to the surface b It melts entirely c It cools, becomes denser, and sinks 10 Which statement best describes sea-floor spreading? a Crust is added at ridges and recycled at trenches b Crust only grows without recycling c Crust never changes

Froggy Jumps

Seafloor Spread & Subduction QuizOnline version

Test your ocean floor knowledge.

by Mimi T

What tool did scientists use to map the ocean floor?

Lidar

SONAR

Radar

What forms the longest mountain range on Earth?

Continental mountains

Mid-ocean ridges

Undersea trenches

What is sea-floor spreading?

Subduction of crust

New oceanic crust forms at ridges

Erosion of coastlines

Where does subduction occur?

At mid-ocean ridges

Along coastlines

At a deep-ocean trench

What happens to older crust as new crust forms at ridges?

It rises to the surface

It moves away from the ridge and sinks later

It stays stationary

What is a deep-ocean trench?

A mountain peak under water

A shallow coral reef

A valley where crust sinks into the mantle

How does crust move in the ‘conveyor belt’ analogy?

Remains fixed and heats up

Sinks at ridges and rises at trenches

Spreads at ridges and sinks at trenches

What causes new crust to form at mid-ocean ridges?

Hot magma rising and cooling at the ridge

Sediment deposition

Tidal erosion

What happens to older crust as it moves away from a ridge?

It floats to the surface

It melts entirely

It cools, becomes denser, and sinks

Which statement best describes sea-floor spreading?

Crust is added at ridges and recycled at trenches

Crust only grows without recycling

Crust never changes

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Seafloor Spread & Subduction Quiz

Froggy Jumps

About this activity

Created by

Download the paper version to play

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Seafloor Spread & Subduction QuizOnline version

by Mimi T

What tool did scientists use to map the ocean floor?

What forms the longest mountain range on Earth?

What is sea-floor spreading?

Where does subduction occur?

What happens to older crust as new crust forms at ridges?

What is a deep-ocean trench?

How does crust move in the ‘conveyor belt’ analogy?

What causes new crust to form at mid-ocean ridges?

What happens to older crust as it moves away from a ridge?

Which statement best describes sea-floor spreading?

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