“Open Ocean” Quiz
#1. True or False: The open ocean makes up very little of the
world’s inhabitable space.
True! The open ocean makes up 99% of the inhabitable space on earth!
#2. How much of the world’s surface does the ocean cover? Oceans
cover 70% of the earth’s surface.
#3. How deep is the deepest part of the ocean: 100 feet, 7 miles, or 500 miles?
The deepest known point is almost 7 miles down!
#4. What makes half of the air we breathe?
Phytoplankton make half of ALL the air we breathe.
#5. What’s the largest animal to have ever lived?
The biggest creature on the entire planet, the largest to have ever lived
is the blue whale!
#6. How much does a blue whale eat in a day: 16 grams, 16pounds, or 16 tons?
16 tons!!!
#7. True or False: blue whales are very quiet.
They are NOT quiet. They make the loudest sounds on earth too, allowing
them to talk underwater across distances of hundreds of miles.
#8. What kind of tentacles do comb jellies have instead of
stinging ones?
They have special cells called “colloblasts”. These are very sticky and
help them catch small prey.
#9. What are the tiny hairs on comb jellies called?
They are called cilia.
#10. Why don’t we know a lot about comb jellies?
They’re so fragile and delicate, it’s hard to study them.
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