WONDER #2495: How is Coral Made?

Question 1 of 3

What was the main idea of this Wonder?

  1. Coral grows very slowly to form coral reefs, one of the world’s most diverse ecosystems.
  2. Corals come in many different colors.
  3. The sea is home to many colorful animals, including jellyfish, nudibranchs, and coral.
  4. The Great Barrier Reef can be seen from space.

Question 2 of 3

Which of the following threatens the survival of coral reefs?

  1. Pollution
  2. Climate change
  3. Coral bleaching
  4. All of the above

Question 3 of 3

Which BEST proves that the Great Barrier Reef is a very diverse ecosystem?

  1. “Coral is closely related to two other colorful marine animals, jellyfish and anemones.”
  2. “The world’s largest reef—the Great Barrier Reef—is home to over 2,000 species.”
  3. “Corals get their colors from algae that live in the reef.”
  4. “Coral reefs are home to about a quarter of wild marine life!”

Check your answers online at https://www.wonderopolis.org/wonder/how-is-coral-made.