Ecostudent Challenge 100 Question Quiz

When should you avoid swimming in the ocean?

• dawn, dusk, or at night as this is when sharks are most likely to feed

• the ocean is never dangerous

Why should you leave shiny jewelry at home?

• shiny jewelry might hurt your eyes in the sunlight

• sharks may mistake it for the flash of a fish’s scales

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Great white sharks can detect a single drop of blood in how many gallons of water?

• 25 gallons

• 1 gallon

1. Giant manta rays have a wingspan of more than how many feet?

• 200 feet

• 20 feet

True or False- Manta rays are harmless to humans?

• True- unlike stingrays, manta rays don’t have barbs or stingers at the end of their tails, rendering them harmless to swimmers and divers.

• False, they are have a poisonous stinger at the end of their tail.

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True or False- Manta rays have the largest brains of any species of fish.  They can recognize their own reflection, and show signs of self awareness.

• True- they have scored high on intelligence tests.

• False- they are just basic aquatic organisms.

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1. What are some areas of the world that manta rays have been found?

• Only in rivers and lakes

• 1. Tropical, subtropical, temperate oceans, all across the globe!

Why are manta rays under threat of extinction?

• They are not threatened by extinction

• They are hunted for their gills and poor fishing practices.

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1. Where does “runoff” come from that reaches the ocean and kills marine life?

• the sky

• 1. Farming, sewage, chemical use.

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1. What is the area of the ocean that is depleted of oxygen and causes marine animals to suffocate?

• 1. A dead zone

• a healthy area of water

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