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.