Imagine you are an explorer tasked with documenting the Earth. To pass your 6th-grade geography "certification," you must master these five pillars: , The Lithosphere (land), The Hydrosphere (water), The Atmosphere (air), and The Biosphere (life). Section 1: The Maps and the Globe Before you set out, you need to know where you are.

: A scale tells you how much the real world has been "shrunk" to fit on the paper.

: You should recognize the four (or five) major oceans and features like currents and tides . Sample 20-Question Practice Set