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YOU and world :
UNIT 1 DISCOVERIES TOWARD A LONGER LIFE
UNIT 2 YOUR BODY
UNIT 3 YOUR DEVELOPMENT
UNIT 4 YOUR BEHAVIOR
UNIT 5 EXPLORING YOUR SURROUNDINGS
UNIT 6 EXPLORING YOUR OWN BACK YARD
UNIT 7 EXPLORING THE EARTH AND ITS HEAVENLY NEIGHBORS
UNIT 8 THE WAYS OF THE SCIENTIST
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