Reefs at Risk Newsela

Coral reefs are experiencing:

• Bleaching

• Growth

• Stability

• Pollution

Coral reefs are made up of?

• Sedimentary Rock

• Polyps

• Old shells and bones

• Algae

What happens to coral when the water is too warm?

• Coral thrives and grows rapidly

• Coral expel their algae and turn white

• Coral release toxic chemicals into the water

• Coral will move away from the reef

Since when has NOAA been monitoring the stress heat causes to coral reefs?

• Since 1998

• Since 2005

• Since 1985

• Since 2015

What is the current bleaching event number?

• 1

• 2

• 3

• 4

What is the largest coral reef system in the world?

• Great Barrier Reef

• Belize Barrier Reef

• New Caledonian Barrier Reef

• Red Sea Coral Reef

Today, climate change is being caused by?

• Global wind patterns shifting

• The ocean becoming saltier

• The sun's radiation increasing

• Human activities

How many people worldwide rely on coral reefs for food and jobs?

• 100 million

• 200 million

• 850 million

• 400 million

NOAA estimates that what percentage of the world's coral reefs have already been lost?

• 30%-50%

• 50%-80%

• 100%

• 10%-20%

Which action below is used by the NOAA to help improve the reefs. Choose two.

• Move reefs to freshwater lakes

• Melt glaciers to cool ocean temperatures

• Deploy sunshades to protect corals.

• Move coral nurseries to deeper waters