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allow something to move, act, or flow freely
released
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A rough circular line, route, or movement that starts and finishes at the same place
circuits
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a device for controlling the passage of fluid or air through the pipe, duct, ect.
valves
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an opening of restricted size allowing for passage from one area to another
hatch
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the process of starting an engine; the mechanism for bringing about ignition (ignition switch)
ignition
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large and heavy or solid
massive
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In the ocean your raft might ______ off in the current.
drift
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The height of an object or point in relation to sea level or ground level
altitude
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In the mountains you are at a very high __________.
altitude
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Carries slowly by a current of air or water
drift
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The astronauts walk very _______ in their big suits.
awkward
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possessing great and impressive power or strength, especially on account of size
mighty
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Causing difficulty, hard to do or deal with
awkward
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Thew elephant is a _________ animal.
massive
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a large, bowl shaped cavity in the ground or on the surface of a planet or the moon
crater
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