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Lesson 3 · Urban and regional planners (also called urban planners

Plate tectonics is the unifying theory of Earth science, explaining the distribution of earthquakes, volcanoes, mountain ranges, and ocean basins. Earth's lithosphere is divided into approximately 15 major tectonic plates and several smaller ones that move at rates of 1–10 centimeters per year—roughly the rate fingernails grow. Key variants and boundary forms include divergent boundaries (mid-ocean ridges), convergent boundaries, and transform boundaries.

5 min · 10 XP

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Which GIS distance calculation method uses travel‑time rather than straight‑line measurement?

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