Volcanic Islands and Atolls Concepts

The video tutorial explains the processes that shape landforms, focusing on island formation and erosion. It covers how plate tectonics create volcanic islands, the role of coral reefs in forming atolls, and the eventual erosion and sinking of islands. The tutorial includes active reading instructions and encourages students to visualize and explain future island changes.

What is the primary factor that causes new islands to appear in the ocean?

• Human intervention

• Changes in sea level

• Movement of tectonic plates

• Erosion of existing land

What happens when two tectonic plates meet at an oceanic trench?

• They form a mountain range

• One plate sinks beneath the other

• They create a new ocean

• They cause an earthquake

How do volcanic islands stop growing?

• When their volcanoes become inactive

• When they reach a certain height

• When they are eroded by waves

• When they are covered by coral reefs

What forms around volcanic islands in tropical regions?

• Deserts

• Coral reefs

• Sand dunes

• Ice caps

What is an atoll?

• A deep ocean trench

• A submerged mountain

• A ring-shaped coral island

• A type of volcanic island

Why do atolls form only in tropical waters?

• Due to low pressure

• Because of strong currents

• Because of the warm water

• Due to high salinity

What eventually happens to atolls due to plate movements?

• They form new islands

• They become larger

• They sink and disappear

• They turn into mountains

What is the term for the submerged feature left after an island sinks?

• Trench

• Atoll

• Geo

• Ridge

What is the future of the volcanic island of Bora Bora?

• It will merge with another island

• It will erode and leave an atoll

• It will become a desert

• It will grow larger

What activity can students do to explain the process of island formation?

• Perform a play

• Write an essay

• Draw the island's future

• Create a model