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Earth's physical resources: rocks for roads - for iPad/Mac/PC
Quarry managers explain how rock is formed and how they extract different layers of stone. Once blasted and processed, it is used to build roads.
Earth's physical resources: rocks for roads - for iPod/iPhone
Quarry managers explain how rock is formed and how they extract different layers of stone. Once blasted and processed, it is used to build roads.
Earth's physical resources: rocks for roads - for iPad/Mac/PC
Transcript -- Quarry managers explain how rock is formed and how they extract different layers of stone. Once blasted and processed, it is used to build roads.
Earth's physical resources: rocks for roads - for iPod/iPhone
Transcript -- Quarry managers explain how rock is formed and how they extract different layers of stone. Once blasted and processed, it is used to build roads.