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Q18: Use Figure 21.26 below to help explain
Q20: Relative humidity is usually expressed as an_
Q26: An instrument that measures wind speed is
Q37: Light travels 300,000 km/s. Many communications satellites
Q41: Electromagnetic radiation that behaves like a particle
Q49: Compared to nearby places at lower elevations,
Q50: The classification of air as stable or
Q69: Why might a moon's orbit be used
Q72: The most studied and well- documented urban
Q76: The planets are "wanderers" in the night