Rocks From Reefs

Coral animals skeletons grow together to form a structure called a

Tags

NGSS.MS-LS2-3

How do coral animals form their skeletons?

Answer explanation

To form their skeltons, coral animals absorb the element calcium from the ocean water to form calcite.

How are coral reefs formed from coral skeletons?

Answer explanation

When coral animals die, their skeletons remain. More corals build on top of them, gradually forming a coral reef.

Tags

NGSS.MS-LS2-3

Coral reefs form only in the warm, shallow water of tropical oceans.

• true

• false

Reefs usually grow _______ toward the open ocean.

If the sea level rises or if the sea floor sinks, the reef will continue to grow upward too.

• true

• false

Tags

NGSS.MS-ESS2-2

A coral reef is really _______ ________.

Tags

NGSS.MS-LS2-3

What do we know about where geologists find fossils of ancient coral reefs?

Answer explanation

They know that the reef formed in an area with a warm climate and shllow ocean water.

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1