WorksheetsEAP5B - 6.3 Crown of Thorns Starfish
Total questions: 12
Worksheet time: 4mins
1. How does the Crown of Thorns Starfish (COTS) kill its prey?
Eats it whole
Poisons it and then eats it
Chokes it with its legs and then eats it
turns it into liquid form before eating it
1. What is the prototype solution to the COTS?
a powerful poison
underwater robots
breeding killer snails
training an army of divers to kill them
1. Where is Green Island?
Off the coast of Fiji
Off the coast of Victoria
Off the coast of Queensland
Off the coast of Japan
1. How do divers on Green Island kill the COTS?
shoot them with a spear gun
trap them in nets and throwing them on the beach
with knives
an injection of special salts
1. 1. How many COTS did the divers kill in the 18 month period mentioned in the video?
40,000
4,000,000
400,000
14,000
1. What is a COTSbot?
an underwater robot that shows divers where the COTs are
an underwater robot that catches COTs in nets
an underwater robot that shows divers where the COTs are
an underwater robot that kills the COTs using injections of salts
1. What was one of the main challenges in developing the COTbot?
training it to recognise what was and what wasn't a COT starfish
finding the funding (money) for the project
training the robitt to work with human divers
getting it to actually work underwater
1. Why do COTSbots hunt at night?
It's more exciting!
COT starfish hide during the day and come out of hiding at night
because human divers can't dive at night
the water is too warm during the day and this affects the robot's performance
How long does it take for vinegar to kill COTS? (TIP: Careful!!)
more than 24 hours
less than 24 hours
more than 2 days
within 2 days
What does the giant Triton snail eat?
jelly fish
mainly COT starfish and a few other starfish
only COT starfish
small fish
What part of the snail smells and frightens the COT starfish away?
its mucus
its horns
the shell
its nose!
What other research is being done on the snails? (TIP: be careful!)
how to how to get the snail mucus out of the water
identifying which chemical is causing the starfish to react.
how to breed the snail to get the numbers they need
how to make robots look more like Triton snails
