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This collection of activities is based on a weekly series of space science problems intended for students looking for additional challenges in the mathematics and physical science curriculum in grades 6-12. The problems deal with modern science and engineering issues, often involving actual research data.The section titles in this 75-problem collection include:-- What Is Life?-- What Makes a World Habitable?-- The Search for Earth-like Planets-- Exoplanets and Their Properties-- Basic Astronomy-- The Drake Equation-- Searching for Extra Terrestrials.Each word problem includes background information. One-page teachers' answer keys accompany the one-page assignments.