Show:
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B
C
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E
100
speed up
What is accelerate
100
slow down
What is decelerate
100
ignited by the delay element and produces expanding gases which activate or eject a recovery device
What is ejection charge
100
slipped over the launch rod and guides the rocket in a stable path until the rocket has reached a speed at which the fins stabilize it
What is launch lug
100
One variable that could not be controlled in either the Alka-Seltzer rockets or the model rockets.
What is wind/weather
200
the force that pulls all objects to the center of the Earth
What is gravity
200
ignites after the propellant burns out and is in aid in tracking the rocket in providing a time delay during which the rocket coasts to apogee
What is delay element
200
the force that makes the rocket accelerate upward as the propellant is burning
What is thrust
200
rate of motion in a given direction measured in terms of distance moved per unit of time.
What is velocity
200
You must stand at least _____ feet from the launch pad.
What is 15
300
the peak altitude a rocket reaches when it is farthest from the surface of the earth
What is apogee
300
a mixture of fuel and an oxidizer which is the source of motive energy in a rocket
What is propellent
300
action/reaction
What is Newton's Third Law of Motion
300
Define variable.
What is things that may or may not influence an experiment
300
It is not safe to launch a model rocket if the wind is blowing more than ____ mph.
What is 20
400
an electrical device that ignites the combustion of the propellant in a model rocket engine
What is igniter
400
the force that resists the forward motion of an object as it moves through the air
What is drag
400
provide guidance and stability for the model rocket
What is fins
400
2 variables that COULD BE controlled in your Alka-Seltzer rockets
What is fuel (tablet) and water
400
Describe the roll of fins in a model rocket.
What is stabilize it during flight.
500
the lift off of a model rocket following the ignition of the engine
What is launch
500
the device in a model rocket whose purpose is to return the rocket to the ground safely by creating excess drag or by creating lift
What is recovery system
500
tendency of a rocket to maintain a straight course along the axis of thrust
What is aerodynamic stability
500
List the FIVE steps in the Scientific Method, in order.
What is Problem, Hypothesis, Experiment, Observations/Results, Conclusions
500
When a rocket has slowed enough, it will stop going up and begin to _______ and head downward.
What is arc over