WONDER #1216: What Keeps the Ocean from Draining Through the Sand?

Question 1 of 3

About how much water is in the world’s oceans?

  1. 321 million cubic miles
  2. 321 billion gallons
  3. 321 gallons
  4. 123 trillion cubic miles

Question 2 of 3

Which of the following is probably NOT a material you’d find making up the ocean floor?

  1. sand
  2. wood
  3. rock
  4. minerals

Question 3 of 3

What natural process helps keep the world’s oceans full?

  1. evolution
  2. gravity
  3. water cycle
  4. aging

Check your answers online at https://wonderopolis.org/wonder/what-keeps-the-ocean-from-draining-through-the-sand.