Air & Bernoulli
An airless place
Vacuum
The number of basic forces that act on a flying object
Four
These bones form the wing area of a bat
Fingers
Helicopter wings
Rotors
Otto Lilienthal is known for this type of aircraft
Hanglider
78% of air is this
Nitrogen
IN ALPHABETICAL ORDER, these are the four forces acting on a flying object
Drag, gravity, lift, and thrust OR What are drag, lift, thrust, and weight
These seeds appear to be fur-covered
Milkweed
The ability to take off and land this way is part of a helicopter's value
Vertically
The Montgolfier brothers were the first to do this, in 1782
Launch a hot air balloon
The percentage of air that is oxygen
21%
These two items provide thrust for a non-jet plane
Engine and propeller
Bats spread seeds through this, as it is called in Spanish
Guano
This aircraft is similar to a helicopter, but it cannot hover
Autogiro
Bernoulli's discovery
"As air moves ACROSS an object, it pushes DOWN less on an object"
This force opposes thrust
Drag
This plant's large seed pods are blown by the wind to that they fly/roll
Tumbleweed
These three gases have been used to filled blimps or flying balloons
Hot air, helium, and hydrogen
The first human powered airplane (1977)
The Gossamer Condor?
When a plane flies, air moves ? under the wing than over it.
"slower"
These adjust drag on a plane
Wing flaps
The spelling of this synonym of "air-filled", which describes a bird's bones
P-N-E-U-M-A-T-I-C
A balloon/blimp must do this if it can fly
A mass of air equal to its mass
The Wright brothers historic flight occurred this many years ago
110 (1903)