In the school garden have students plant a patch of sunflowers. Use plants started in the greenhouse, as soon as the danger of frost has passed. As flowers develop, have students observe the direction they face, and discuss the possible reasons for this. Water carries essential nutrients from the roots and acts as a solvent for essential salts and minerals. Water translocates photosynthetic products from the leaves via the phloem.
Water is a chemical reactant in many plant processes including photosynthesis.
Water provides turgidity by supporting the structure of herbaceous plants and adding cell tugor to all plant cells. Water cools the plant during transpiration. Water quality is important to plants. Capillary water is used by the plants. This water moves freely in the soil and can move up and down, or horizontally.