Properties of Air
The higher you go, the lower the air _______.
What is pressure?
When this is greater than drag, the plane accelerates.
What is thrust?
The parts of a plane that help lift it into the air.
What are wings?
This part of a bird's body is essential for flight.
What are wings?
Bernoulli’s principle explains how this moving substance creates differences in pressure.
What is fluid (or air)?
Air filling a balloon demonstrates that it takes up __________.
What is space?
Planes are streamlined in order to reduce this force.
What is drag?
This provides the thrust to overcome drag and push the plane forward.
What is the engine?
True or false: all flying animals have feathers.
What is false?
According to Bernoulli’s principle, as the speed of a fluid increases, this decreases.
What is pressure?
An inflated balloon weighs slightly more than a deflated balloon. This shows that air has ______.
What is mass (or weight)?
This force pulls the plane (and everything else) towards the earth.
What is weight (or gravity)?
The main body of the aircraft.
What is the fuselage?
These small creatures are known for being the only flying mammals.
What are bats?
The Bernoulli Principle helps explain why airplanes can do this.
What is fly?
True or false: air can be compressed, but water cannot.
What is true?
The rounded edge of an airplane wing increases this force.
What is lift?
These are used to increase the lift of an aircraft wing.
What are flaps?
Birds flap their wings to generate this upward force that lifts them into the air.
What is lift?
In a narrow pipe, fluid moves faster and pressure becomes this.
What is lower (or less)?
When air is heated, the molecules move faster and spread out, making the air do this.
What is expand?
This term refers to the point at which an aircraft experiences a sudden loss of lift due to excessive angle of attack.
What is a stall?
The flight control surface that controls the lift of the wing.
What is the elevator?
This part of a bird’s body helps them steer and balance during flight.
What is the tail?
The wing shape of an airplane, which generates lift using Bernoulli’s principle, is called this.
What is the airfoil?