Air Vocabulary
_________________ is an upward force that acts to overcome the weight of a living thing or object and hold it in the air. The opposite of weight.
Lift
_____________ is the upward push of a fluid on an object.
Buoyancy
When a submarine's ballast tanks are filled with air it ____________
Floats
True or False. All birds can fly
False
__________ is a force that is caused by gravity and that acts on a living thing or an object in a downward direction. The opposite of lift.
Weight
_____________ is a force that is caused by gravity and that acts on a living thing or an object in a downward direction.
Weight
When a submarine's ballast tanks are filled with water, it _______________
Sinks
Birds can fly because their bones are _________
Hallow
__________ is a force that can act in the direction of movement. The opposite of drag.
Thrust
______________ is the amount of liquid or gas that gets pushed out of its place when something is put into it.
Displacement
When a submarine's ballast tanks are half filled with air and water it _______________
Is suspended under water
What happens to an object’s altitude when lift is greater than weight
It flies
_______________ is a force that can act in opposition to the direction of movement. The opposite of thrust.
Drag
___________ is how tightly packed the matter in something is. Things that are more dense than sink, and things that are less dense float
Density
A golf ball sinks because of its ____________ compared to water
Density
The shape of an airplane's wings are designed to help with
Lift
_____________ is the vertical distance of an object measured from sea level.
Altitude
True or False. A boat will sink if it is too heavy.
False
An object floats when its buoyant force is _______________
Equal to or greater than the object’s weight
If your paper airplane falls despite throwing it hard it is because of too much
Drag