Cycles--Earth's air, water and soil must be constantly recycled.
Sunlight Energy--Sunlight energy is the power for all life.
Communities--Every plant and animal lives in a community that meets its special needs.
Relationships--To succeed, living things must interrelate with others.
Changes--Everything on earth is undergoing change.
Differences--Differences in groups of plants and animals allow each to live successfully.
Gifts--Each plant and animal has special gifts.