Darwin-Dana-Daly theory of how an atoll forms

What is an atoll?

• a ring shaped reef

• Made up of coral reefs

• It has an open lagoon in the center

• all answers are correct

A body of shallow water partly cut off from the ocean by coral reefs is called which of the following? (a)  

• a basin
• a bay
• a gulf
• a lagoon

The Darwin-Dana-Daly theory states:

• volcanoes erupt, and coral grows on island

• Climate change and sea level rise cause the island to flood and cause a lagoon

• An atoll (the fringe around the island) is left with coral on it

• all answers are correct

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-5

The atolls are happening faster now because of :

• climate change causes glaciers to melt

• sea levels rising

• flooding all low lying areas

• all answers are correct

Tags

NGSS.MS-ESS2-6

How does an atoll form from a volcanic island?

• 1. volcano develops 2. a coral reef forms around the volcanic island

• 3.fringing reef surrounds the island

  4.the barrier coral reef protects the island as the island sinks.

• both answers show the process

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2