Worksheets6th period - Snakes Rule!
Total questions: 15
Worksheet time: 15mins
How many brown tree snakes are there per square mile in Guam?
1.5 million
1940
9,000
When did the snakes arrive in Guam?
In the early 2000s
In the 1940s
In the 1970s
Yesterday
How long can these snakes grow?
3 meters long
10 feet long
3 meters (10 feet) long
All of the above
What do brown tree snakes eat?
Other snakes
Rats
Crickets
Lizards and birds
The arrival of brown tree snakes in Guam has become a problem because...
Dr. Nichols said so
at least 3 lizard species & 9 bird species have disappeared.
the island is small.
they are scary.
Why have brown tree snakes not caused problems in their natural habitat?
Natural enemies, or predators, kept them under control.
People wanted them as pets.
Their natural habitat is bigger than Guam.
They were endangered.
How did the brown tree snakes arrive in Guam?
A family brought their pets on vacation and they escaped.
The National Wildlife Organization wanted to protect them.
After World War II, they came as stowaways on cargo ships.
They heard the weather was nice, so they swam there.
Once they arrived, how did they become so highly populated?
There weren't any predators to eat them.
They had plenty of birds and lizards to eat.
Their food sources didn't have any natural defenses.
All of the above.
Do brown tree snakes pose a serious threat to humans?
Yes
No
What happens when the snakes climb up power poles and around electric lines?
They watch for food from up high.
They cause short circuits that can lead to power outages.
They get electrocuted and die.
Why have screens been unsuccessful at containing the snakes?
They are good at climbing & wriggling through the openings.
People built them so they were not strong enough.
The screens were expensive.
The snakes crawled underneath them.
What are the limitations of electrified fences?
Expensive
Not able to use in areas where pets, people, and animals are
All of the above
What is not used often because it can harm humans and other organisms?
Electric fences
Traps
Screens
Poison
Why doesn't it make sense to use traps?
It takes too many traps to catch just a few snakes.
Traps are mean.
There are not mice to use for traps in Guam.
There are no materials available to build the traps.
Why did the government publish recipes for cooking dishes made from brown tree snakes?
They taste like chicken.
They want to encourage people to hunt them for food.
They want to scare snakes away by threatening to cook them
Snakes like to be fried.
