Fun with plants Do at least of two of the four games. Tools A B root draw water from the ground to plant stem carries water up from roots leaves make food for the plant from sunlight, air, and water flower makes the seeds become new plants photosynthesis process in which the plant uses sunlight and chlorophyll oxygen plants give this off into the air carbon dioxide plants get this from the air sunlight plants need this to grow chlorophyll substance that makes plants green air plants use carbon dioxide and return oxygen water too little or too much will kill nutrients nitrogen, phosphorous, and potassium