Forces of Flight
Which force acts against gravity to keep an airplane in the air?
Lift
What is the word used to describe the sleek, smooth shape of a plane?
Streamlined
Name one bird that cannot fly
Penguin, Ostrich, kiwi, emu
Name 2 lighter than air flying devices
Blimps and hot air balloons
What invention allowed humans to travel to space?
Rockets/Spaceships
An airplane speeds up on the runway before takeoff. Which force is increasing?
Thrust
Which airplane part controls up and down movement of the nose?
The elevator
DOUBLE POINTS: What is this movement called?
What do birds use to help them fly?
Wings and feathers
True or False: Lighter than air flying devices float in the air
True
Rockets carry this to mix with fuel to create exhaust to push the rocket forward
Liquid Oxygen/Oxidizer
Why does fast-moving air over the top of a wing help an airplane fly?
It lowers air pressure above the wing and creates lift.
DOUBLE POINTS: What is the name of this principle that creates lift?
What is the shape of the wing called?
Airfoil
Birds move their wings in this motion to help fly forward
ACT IT OUT
What is the name of a flying device that rises because hot air is trapped inside it?
A hot air balloon
Why do parachutes fall slowly?
They create lots of drag
If drag becomes greater than thrust during flight, what will happen to the airplane?
The airplane will slow down
What is the movement of an airplane that tilts side to side called?
ROLL
What are two ways that marine animals propel themselves forward?
S-Shaped movements and Jet propulsion
What gas is commonly used in blimps because it is lighter than air and safe?
Helium
The method used to move objects or animals forward is called what
Propulsion
Explain how all four forces of flight work together during takeoff.
Thrust moves the airplane forward, lift pushes it upward, gravity pulls it downward, and drag resists motion through the air. The airplane takes off when lift becomes greater than gravity.
A pilot wants to turn the airplane while keeping control and balance. Which three control surfaces work together?
Rudder, elevator, ailerons
Explain Bernoullis principle and how it can create lift
The shape of the wing changes air pressure. Speeding air up (low pressure) above the wing and slowing air down (high pressure). The high pressure air pushes the wing up.
Why does hot air help a balloon rise?
Hot air is less dense than cold air
The upward force that allows objects to float in air or water
Buoyancy