Drag is the force that opposes the motion of an aircraft through the air. It is caused by the resistance of the air to the aircraft's movement.

Lift and drag are two opposing forces that act on an aircraft in flight. Lift is the force that opposes gravity and keeps the aircraft in the air, while drag is the force that opposes the aircraft's motion through the air. In steady-state flight, lift and drag are equal in magnitude.

The angle of attack of the wing is the angle between the wing's chord line and the relative wind. The greater the angle of attack, the more lift is generated by the wing.

The shape of the aircraft is the primary factor that determines the amount of drag generated by the aircraft. A streamlined shape will generate less drag than a blunt shape.

Cruise is the term used to describe the point at which the lift generated by an aircraft's wing is equal to the weight of the aircraft. This is the point at which the aircraft is flying at a constant speed and altitude.

Stall is the term used to describe the point at which an aircraft's wing no longer generates enough lift to keep the aircraft in the air. This can be caused by a number of factors, including a high angle of attack, a low airspeed, or a change in the shape of the wing.

Elevators are the primary control surface used to control the pitch of an aircraft. They are located on the trailing edge of the horizontal stabilizer and are used to pitch the aircraft up or down.

Ailerons are the primary control surface used to control the roll of an aircraft. They are located on the trailing edge of the wings and are used to roll the aircraft left or right.

The rudder is the primary control surface used to control the yaw of an aircraft. It is located on the trailing edge of the vertical stabilizer and is used to yaw the aircraft left or right.

Flaps are used to increase lift. They are located on the trailing edge of the wings and are extended to increase the camber of the wing, which in turn increases the lift generated by the wing.

Slats are used to increase lift. They are located on the leading edge of the wings and are extended to increase the camber of the wing, which in turn increases the lift generated by the wing.

A spin is a phenomenon in which an aircraft loses control due to a sudden change in airflow over the wings. This can be caused by a number of factors, including a high angle of attack, a low airspeed, or a change in the shape of the wing.

Turbulence is a phenomenon in which an aircraft experiences a sudden loss of altitude due to a change in air density. This can be caused by a number of factors, including wind shear, updrafts, and downdrafts.

Wake turbulence is a phenomenon in which an aircraft experiences a sudden loss of altitude due to the wake of another aircraft. This can be caused by a number of factors, including the size of the aircraft, the speed of the aircraft, and the distance between the aircraft.

Wind shear is a phenomenon in which an aircraft experiences a sudden change in altitude due to a change in wind direction. This can be caused by a number of factors, including the presence of mountains, buildings, or other obstacles.