Coral Reefs

What are the three main types of coral?

Coral reefs are sometimes called the '________ of the sea' because they form some of the Earth's most diverse ecosystems.

• rainforests

• deserts

• mountains

• plains

What percentage of marine species do coral reefs provide a home for?

What is the hard, protective limestone skeleton at the base of hard corals called?

What are some of the benefits that coral reefs provide to local communities?

• Coral reefs provide food and income through fishing and tourism.

• Coral reefs are harmful to local communities.

• Coral reefs have no impact on local communities.

• Coral reefs only provide aesthetic value.

Some natural threats to coral reef systems include:

• Overfishing

• Coral bleaching

• Pollution

• All of the above

One of the human-caused threats to coral reefs is:

• Overfishing

• Natural disasters

• Predation by marine animals

• Coral bleaching due to sunlight

What happens to corals when the water is too warm?

• They thrive and grow faster

• They become more colorful

• They bleach and may die

• They move to cooler areas

Fill in the blank: Between the years of 2014-2017, unusually warm waters affected ___% of coral reef ecosystems worldwide.

• 10%

• 20%

• 30%

• 40%

The three main types of coral reefs mentioned in the text are:

• Fringing reefs, Barrier reefs, and Atolls

• Patch reefs, Ribbon reefs, and Table reefs

• Coral gardens, Reef flats, and Reef slopes

• Lagoons, Reef crests, and Reef walls