Properties of Air
What you discover if you were to blow up one balloon and tie it on one side of a meter stick, while the other side has an uninflated balloon.
Air has weight
When you pump air into a bicycle tire.
Air is compressing
This downward force on an aircraft is caused by gravity.
Weight
It is shaped to allow fast moving air to move on top of it and slower moving air on the bottom.
Airfoil-shaped wing
An invisible mixture of gases which make up the earths atmosphere.
Air
The property of air demonstrated by the cup of water being flipped upside down with a piece of cardboard on the top and the water doesn't spill out when the person's hand is removed.
Air exerts pressure
What happens when air flows faster on the upper surface (less pressure) than on the lower surface of an airfoil (more pressure)?
Lift
The upward force that is created by the movement of air above and below a wing.
Lift
The purpose of a bird's strong chest muscles.
Stronger muscles mean that the bird can flap its wings more often
The gas that human blow out and makes up 0.04% of the air in our atmosphere.
Carbon dioxide
The property of air that is demonstrated when air is blown around a canand the candle's flame on the other side goes out.
Air is a fluid
When manufacturers shape an object such as a vehicle so it will move faster through the air.
Streamlining
The force that moves a plane forward through the air. This may be created by a propeller or jet engine.
Thrust
Both insects and birds have adaptations for flight. Name a similarity between the two.
When gliding, birds and insects obtain both a vertical and a forward force from their wings.
A chemical reaction that takes place when a substance combines with oxygen.
Oxidation
The "tissue in a cup" experiment demonstrated this property of air. The tissue did not get wet because...
Air takes up space
When air flows faster on the upper surface (less pressure) than the lower surface of an airfoil (more pressure), creating lift.
Bernoulli's Principle
The air resistance that tends to slow the forward movement of an airplane.
Drag
Name two special adaptations that insects have for flight.
Body shapes and ability
The gases that occur in very small amounts in the atmosphere.
Trace gases
The property used to explain the egg sucking bottle demonstration.
Air can be compressed
An aircraft descends and slows down.
Drag and weight are increasing, lift and thrust are decreasing
When all four forces are equal, this will happen.
Hovering
Name one difference between the way an airplane and a bird flies.
Birds have muscles planes don't
The three gases that make up most of the atmosphere.
Nitrogen, oxygen and argon