Air & Bernoulli
The number of basic forces that act on a flying object
What is four?
These bones form the wing area of a bat
What are fingers?
Helicopter propellers
What are rotors?
How soon can a dove fly after it is hatched?
What is 2 weeks?
78% of earth's atmosphere is made up of this
What is nitrogen?
IN ALPHABETICAL ORDER, these are the four forces acting on a flying object
What are drag, gravity, lift, and thrust? OR What are drag, lift, thrust, and weight?
Some seeds act the same as the top of a helicopter
What is a rotor?
The ability to take off and land this way is part of a helicopter's value
What is vertically?
A bird has these kinds of bones
The percentage of air that is oxygen
What is 21%?
These two items provide thrust for a non-jet plane
What are an engine and propeller?
Bats spread seeds through this, as it is called in Spanish
What is guano?
What are 3 reasons humans can't fly
What are: too heavy, need longer arms, need shorter legs, no feathers, too big, not enough alveoli in the lungs
Birds have extra these in their lungs
What are alveoli?
Bernoulli's principle states
What is "fast air creates low pressure and slow air creates high pressure. High pressure wants to move into areas of low pressure"
This force opposes thrust
What is drag?
This plant's large seed pods are blown by the wind to that they fly/roll (hint: they are often found rolling in cheesy western movies)
What is a tumbleweed?
These three gases have been used to filled blimps or flying balloons
What are hot air, helium, and hydrogen?
This is the largest flying bird
What is The wandering albatross?
When a plane flies, air moves ? under the wing than over it.
What is "slower?"
These adjust drag on a wing
What are wing flaps?
A balloon/blimp must do this if it can fly
Overcome gravity
it serves as a spring that holds and releases energy while the bird flaps its wings attempting to fly
What is a wishbone?