Forces
What force pulls objects towards Earth?
Gravity (Weight)
What is moving air also known as?
Wind
List one animal from the passage that uses fast wing movement to hover.
Bee/Butterfly
What part of an airplane creates lift and helps it stay in the air?
Wings
Wind pushes against trees and umbrellas on a windy day. What property of air is this?
Air has pressure
What force pushes an airplane upward?
Lift
What property of air explains why balloons stay filled?
Air takes up space.
What body covering helps birds move smoothly through the air?
Feathers
Name two thing pilots change to control how a plane moves in the air.
Speed, direction, and angle.
A soccer ball stays firm and round after being pumped with air. What property of air is this?
Air takes up space
What force moves an airplane forward?
Thrust
What is sticking out your hand out of a moving car window and feeling pushing an example of?
Air has pressure
Give one reason insects are able to fly easily even though they are small.
Light body or fast wing movement
What force do airplane engines create that push the plane forward?
Thrust
A hot air balloon rises into the sky after the air inside is heated. What property of air is this?
Warm air rises
What force slows objects down by pushing against movement?
Drag
This property of air helps create lift when air moves around airplane wings.
Air Pressure
Bats have this special feature that allow them to make sharp turns.
Long fingers and skin stretched over them to make their wings.
What happens when drag becomes stronger than thrust?
The plane slows down
A parachute opens and a person falls slowly to the ground. What force is acting here?
Drag (air resistance)
What 2 forces work together against each other to control speed?
Thrust and Drag
Hot air balloons rise because warm air is ________ than cold air.
Lighter
Birds have these that make them light enough to fly.
Hollow Bones
What must be stronger than weight for a plane to take off?
Lift
What do both birds and airplanes need in order to create lift?
Air/Moving Air