sentences:  Although the scientists on the satellite attempt to supply weather forecasts for the Mesklinites, they are using tools designed for Earth's weather to predict conditions in a two-component water/ammonia system instead of Earth's one-component system.Even local effects, such as liberation of latent heat from mixtures undergoing freezing or condensation, can produce drastic changes in conditions.Seemingly solid surfaces can liquefy under the pressure of the land cruisers, even as individual Mesklinites can walk on them in complete safety.