Posts tagged as water

Points on Photosynthesis – Junior Cert Science

Photosynthesis Green plants make food by photosynthesis. Photosynthesis occurs in the leaves of a plant. The green chemical chlorophyll is needed for photosynthesis. Chlorophyll traps light energy and uses it to combine carbon dioxide and water. This forms glucose and oxygen. Leaves have air spaces between their leaves called stomata. The three things needed for… Continue Reading →

The Water Cycle – Junior Cert Geography

1.The sun’s heat evaporates seawater and turns it into a gas called water vapour. 2.The light water vapour rises, cools and condenses into tiny droplets which make up cloud. 3.Further cooling and condensation results in precipitation. 4.Surface run-off(rivers) and soakage returns most of the water to the sea ( some… Continue Reading →

Hardness in Water

Hard water is any water that forms a scum with soap. Soft water forms lather with soap. Hardness is caused by dissolved calcium and magnesium icons (Ca2+ and Mg2+). Temporary hardness Temporary hardness can be removed by boiling the water. Problems caused by temporary hardness: forms scum (wastes soap), limescale… Continue Reading →

The Water Treatment Process

Water treatment plants convert the raw untreated water to consumable water that is available at your home. The stages of water treatment: Sedimentation: Large particles are screened out and smaller particles are left to settle to the bottom of the sedimentation tanks. Flocculation: Aluminium sulphate (which is a flocculating agent) is added… Continue Reading →