Glossary term: 泰坦
Description: 土卫六（泰坦）是土星最大的卫星。它比月球和水星都大，是太阳系中第二大的卫星。除地球外，土卫六是唯一已知表面有液态大洋、海和河流的天体。不过，这些都是由被称为碳氢化合物的化学物质构成的。土卫六被认为有一个岩石核心和一个由水构成的冰壳。人们认为冰壳下的液态水可能孕育着生命。土卫六的大气层很厚，主要由氮气构成，这使得它在照片上看起来非常光滑。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
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Credit: NASA/JPL-Caltech/Space Science Institute credit link
License: PD Public Domain icons
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Credit: NASA/JPL/University of Arizona/University of Idaho credit link
License: PD Public Domain icons
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Tags: Maps , Planetary cartography , Spatial thinking Age Ranges: 6-8 , 8-10 , 10-12 Education Level: Middle School , Primary , Secondary Areas of Learning: Social Research Costs: Low Cost Duration: 2 hours Group Size: Group Skills: Analysing and interpreting data , Asking questions , Communicating information , Constructing explanations , Developing and using models , Engaging in argument from evidence , Planning and carrying out investigations
