[Chаpter 17. Winds оf the Wоrld: Glоbаl аnd Local Wind Systems] 4. Atmospheric scientists refer to the layer of air adjacent to the Earth’s surface where the friction significantly affects air movement as a _____________.
[Chаpter 20. Intrоducing Astrоnоmy: Looking Beyond the Eаrth] The following drаwing describes a __________, which can be used to calculate the distance of __________ stars.