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Core knowledge about matter.url Heat and Cold.url heating water.url The World of Science, PP 107-120.cmap The World of Science, PP 133-143.cmap The World of Science, PP 156-167.cmap The World of Science, PP182-187.cmap The World of Science , PP 40-50.cmap The World of Science, PP 62-67.cmap The World of Science pp 20-25.cmap The World of Science PP 28-39.cmap World of Science.cmss