WONDER #2628: What Are Marimo Moss Balls?

Question 1 of 3

What do experts think causes marimo moss balls to rise and sink?

  1. Photosynthesis
  2. Predators
  3. Circadian rhythms
  4. Both a and c

Question 2 of 3

Which is NOT a threat to marimo moss balls, according to experts?

  1. Pollution
  2. Swimming
  3. Pesticides
  4. Climate change

Question 3 of 3

What was the main idea of this Wonder?

  1. Many people like to keep marimo moss balls in their aquariums as pets.
  2. The lakes of the world are full of a wide variety of organisms, many of which are nearly extinct.
  3. The Ainu people hold a festival called Marimo Matsuri each year to celebrate nature.
  4. Marimo moss balls are an endangered species currently only found in two freshwater lakes—one in Japan and another in Iceland.

Check your answers online at https://www.wonderopolis.org/wonder/What-Are-Marimo-Moss-Balls.