Riddles
What kind of room has no doors or windows?
a mushroom
This country has over 2 million natural lakes, the most in the world.
Canada
People from this city eat 12x more pretzels than average Americans.
Philadelphia
Hummingbirds are the only birds that can do this while flying.
hover
This phenomenon occurs when you can't remember a word but you're sure you know it.
tip-of-your tongue
I shave every day, but my beard stays the same. Who am I?
Barber
The most densely populated city in the world, with 37 million people.
Tokyo, Japan
This PA river's name comes from the Lenape word for "hidden river".
Schulyhill River
Some species of this animal can survive being frozen solid and are alive once unthawed.
frogs
Your brain weights this, about the same as a small melon.
3 pounds
The more you have of me, the less you see. What am I?
Darkness
This sea between Europe and Africa includes islands like Sicily and Crete.
the Mediterranean sea
This PA legend involves a "headless horseman" and inspired a famous short story.
The legend of sleepy hollow
The largest organ apart of the human body.
The skin
When your brain interprets an image or sound different than reality, it's called this.
optical illusions
What can travel around the world while staying in the same corner?
A stamp
In Canada, apologizing too much led to a law stating that saying "sorry" doesn't necessarily mean this.
admitting guilt
PA has a state insect, commonly seen in gardens and meadows.
fireflies
The only mammal that is capable of true flight.
bats
This rare sleep disorder causes people to suddenly fall asleep.
Narcolepsy
What comes once in a minute, twice in a moment, but never in a thousand years?
the letter M
Located near Australia, this massive coral reef is the largest living structure on Earth.
The great barrier reef
Why is Pennsylvania called the "Keystone" state?
Pennsylvania is called the Keystone State because of its central location among the original 13 colonies and its crucial role in the founding and development of the United States.
This planet is sometimes called Earth's twin because it is similar in size, density and mass.
Venus
This occurs when the brain forms new connections in response to learning or experience. This is also why therapy works!
Neuroplasticity