Unit 1: Humans are living organisms.
Unit 2: The interaction function.
Unit 3: Animals.
Unit 4: Plants.
Unit 5: Planet Earth.
Unit 6: Air and water on Earth.
Unit 7: Landscapes.
Unit 8: Plans and maps.
Unit 9: We live in a community.
Unit 10: We do jobs.
Unit 11: Machines help us.
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