Fluids and fluid motion play major roles in numerous geologic processes on Earth's surface and interior. This course provides a quantitative introduction to the geologic fluids that shape our dynamic planet. Emphasis will be placed on mastering basic concepts in fluid mechanics and applying these concepts to a wide range of geologic problems. Goals include: (i) exploring important fluid systems of the Earth, such as atmosphere, rivers, groundwater, glaciers and magmas; (ii) providing an introduction to basic concepts in fluid mechanics, such as laminar versus turbulent flow, viscosity and convection; (iii) illustrating applications of basic ideas, such as derivatives and integrals in mathematics to earth science problems; and (iv) developing the habit of thinking analytically and quantitatively. Students will be tested on both key vocabulary and applications of the material covered in lecture to geologic problems. The latter will involve both clear, qualitative explanations of the mechanics involved as well as mathematical, quantitative analyses and calculations. The course is designed primarily, but not exclusively, for majors.