Properties of Air
What device did we use to prove that Air can be compressed
We used a plastic syringe
Bernoulli's Principle states that
As the speed of a fluid/air increases, the pressure decreases
and when the speed of a fluid decreases the pressure increases
What are the four forces of flight?
Weight/Gravity, Lift, Thrust, Drag
Insect wings are _____________ shaped
airfoil
This gas makes up 80 percent of the composition of the air around us.
Nitrogen
What is Bernoulli's first name?
Daniel
To generate lift the _______ ____ _____ underneath the airfoil pushes the aircraft up
High Air Pressure
In order for a plane to fly,
Lift must over come __________ and
____________ must over come Drag.
Gravity/Weight
Thrust
Large insect wings are used for ________ and not _______
Distance and not speed
This gas makes up 20 percent of the composition of the air around us.
Oxygen
Who proved that Air has weight
Pascal
In the hair-dryer ping pong experiment, what was allowing the ping pong ball to hover at the relatively same place (not what keeps it up, what keeps it in place).
The area of high air pressure
_________________ is what generates Thrust
Propulsion
How would you describe the skeleton of a bird?
Lightweight with thin and hollow bones
Name three other gasses besides Nitrogen, Oxygen and Carbon Dioxide that are in the air around us.
helium, neon, methane, krypton, hydrogen, argon
What are the properties of air that we talked about in class? (Name at least 3)
Air occupies space
Air has weight
Air exerts pressure
Air acts like a fluid
Air can be compressed
If you try to blow a piece of crumpled up paper into the mouth of a water bottle it won't go in. Use air and aerodynamics concepts to explain.
Because the low velocity inside the water bottle was creating an area of high pressure and always pushed the ball of paper out
Give me an example of a structure/device that gives propulsion
Bird and Insect wings
Propellers
Jet Engines
Give at least 2 ways a bird's tail helps it with flight.
It helps the bird with
- Lift, speed, direction and balance
After nitrogen and oxygen what is the next most abundant gas in our atmosphere?
Argon (Argon is close to 0.9% and Carbon Dioxide is close to 0.4%)
In the experiment where we flipped a cup filled with water on a playing card, the water did not spill. How did this happen?
The atmospheric pressure was greater than the weight of water and so it was pushing on the card, keeping the water from spilling.
In the experiment where we blew air between two balloons, the balloons were being pushed together instead of apart. Why?
What was going on in between the balloons?
Between : High Velocity and Low Pressure
While in flight an airplane experiences the downward force of _____ and the upward force of ________
gravity, lift
What is a unique adaptation for flight that lightening bugs (and many other flying beetles) have?
Hardened outer protective shell on their wings that protects their lighter weight flying wings.
Called Elytra
What is one harmful gas (pollutant) that can be found in the air?
Carbon Monoxide
Nitrogen Oxide
Ozone (O3)
Sulfur Oxides