work - makes movement happen, Balanced Force - no movement, unbalanced force - motion, kinetic energy - motion energy, potential energy - stored energy, weathering - break down, erosion - take away/move, deposition - drop/pile up, sediment - tiny rock, delta - river's end, canyon - river made, valley - glacier amde, cementation - hardened layers, compaction - squeeze layers, retain - hold/keep, fossil fuels - non-renewable, oil - dead animals, coal - dead plants, natural gas - heating gas, sedimentary rocks - made of other rock, biofuel - fuel from an organism, pressure - squeezing, renewable - remade, alternative energy - not fossil fuel, conservation - save/ not use as much, reflect - bounce/mirror, transmit - let through, conductors - metals, insulators - rubber/plastic, refract - bend/lens,

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