Unit 2 Marine Zones Aug. 20 - Coral Reefs

Multiple Choice

What percentage of the ocean is taken up by coral reefs?

• 10-12 percent

• 25 percent

• less than one percent

• more than fifty percent

Multiple Choice

What are coral reefs often compared to?

• forests

• gardens

• rainforests

• deserts

Multiple Choice

Coral Reefs are found in

• tropical waters

• waters around the South pole only

• sub-tropical waters

• A and C

Multiple Choice

Where is the Great Barrier Reef located?

• Puerto Rico
• Florida
• Indonisia
• Australia

Multiple Choice

What is the primary factor responsible for the formation of coral reefs?

• Accumulation of calcium carbonate

• Action of wind erosion

• Erosion of volcanic rocks

• Deposition of iron oxide

Multiple Choice

What are some of the major threats to coral reefs?

• Lack of sunlight and nutrients

• Climate change, ocean acidification, overfishing, pollution, and destructive fishing practices

• Deforestation and land development

• Excessive coral reef tourism

Multiple Choice

What percentage of the ocean's biodiversity (different species) live in coral reefs?

• 10 -15%

• 20%

• 45%

• 25%

Multiple Choice

What is the biggest economic benefit of coral reefs?

• filtration
• habitat
• tourism
• protection of shoreline

Multiple Choice

What causes coral bleaching?

• oil spills

• warmer water temperatures

• overfishing

• red tide

Multiple Select

Choose the facts that demonstrate idea that the coral reefs are in danger of disappearing.

• Ocean ecosystems have great diversity.

• Fishing methods are upsetting the balance of the ecosystem

• Animals are using the branches to hide.

• Water pollution also damages water.

Multiple Choice

Do coral reefs have any chance of surviving?

• Yes, but only with our help

• No, they are dead

• Maybe, it depends on future events

CoralReefs

Functions of Coral Reefs: Coral reefs are important for many different reasons aside from supposedly containing the most diverse ecosystems on the planet.

Importance:

protect coastlines from the damaging effects of wave action and tropical storms

Importance:

provide habitats and shelter for many marine organisms

Importance:

the source of nitrogen and other essential nutrients for marine food chains

Importance:

assist in carbon and nitrogen fixing and help with nutrient recycling.

Importance:

They are also are a source of food and new medicines. Over half a billion people depend on reefs for food, income, and protection.

Multiple Choice

Coral reefs are endangered by ________.

• climate change

• overfishing

• pollution

• all of the above