Flight
4 things that make a plane fly/fall:
Weight: is what makes the plane go down.
Lift: is what makes the plane lift up.
Thrust: is what boosts the the plane using the engines.
Drag: comes from air resistance, the more air resistance the plane has the more drag it will have.
How things with wings or propellers overcome earth's gravity:
Birds rotate their wings round and round to overcome gravity so they can fly
Planes have bigger wings (than birds) and engines which they use to overcome gravity to travel
Helicopters use their propellers to lift them up and overcome gravity.
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