Activity • Affects • Air • Becomes • Both • Circulates • Circulation • Cold • Concentrated • Currents • Describe • Differ • Direction • During • Earth • Factors • Flows • Formation • Forms • Gradients • Hemisphere • Hemispheres • Into • Layer • Outermost • Patterns • Polar • Poles • Present • Refers • Regions • Rotation • Sending • Separates • Significant • Simultaneously • Smaller • Southward • Specific • Specifically • Temperature • Troposphere • Vertically • Vortex • Weakens • Weather • When • Which • Winter • Yes