The speed of a sound wave increases as it travels from cool air to hotter air. What happens to the wavelength of a sound wave as it travels from cool air to hotter air? Group of answer choices The wavelength of a sound wave increases as it travels from cool air to hotter air. The wavelength of a sound wave decreases as it travels from cool air to hotter air. The wavelength of a sound wave stays constant as it travels from cool air to hotter air