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"From the thin air of Mount Everest to the intense pressure of the Challenger Deep, Earth is full of amazing extremes! Record-setting extremes are always being updated. Scientists and explorers discover new materials and refine their measuring methods, upsetting our ideas of """"biggest"""" or...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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2
"Crucial to our existence, water sustains all life on Earth. Following the old adage, """"""""What goes around comes around-"""""""" water moves continuously through the stages of the hydrologic cycle (evaporation, condensation, and precipitation). How does our drinking water fit into this...
Grade Level   K 1 2 3 4
Classroom Activities Curricula and Instruction
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