Plant Processes There are three plant processes Photosynthesis Respiration Transpiration These work in conjunction to ensure the plant grows

Photosynthesis The process uses light as an energy source to make glucose from carbon dioxide in the air and water from the soil. Photosynthesis occurs in the leaves of a plant

Equation for Photosynthesis Energy from Sunlight Carbon Dioxide + Water Oxygen gas + Glucose (Sugar) The energy in sunlight is absorbed by the chemical chlorophyll which is inside chloroplast cells in the leaves of plants It’s the chlorophyll that gives plants their green colour

Where do the reactants (ingredients) come from? What happens to the products? Carbon dioxide is taken up through the Stomata on the underside of the leaves. Water is taken up through the roots The product of photosynthesis is glucose. Glucose is stored as starch or used by the plant in Respiration – to help the plant grow Oxygen is released through the stomata or used in Respiration

Do Now Complete Questions 1 and 2 on pages 140-141 of your workbook

What is Cellular Respiration? The release of chemical energy for use by cells.

What is Cellular Respiration? Once the energy that was in sunlight is changed into chemical energy by photosynthesis, an organism has to transform the chemical energy into a form that can be used by the organism. This process is cellular respiration.

What is the chemical equation for cellular respiration?

Do Now Collect a compare and contrast sheet for photosynthesis and respiration You need to list all the things similar to both processes in the middle box On the side boxes list the things that are different or only occur in one of the processes This sheet will help you build an exam answer in the future

Building new plant material - Growing New plant matter is built up from carbohydrates. The energy comes from respiration & nutrients from the soil Photosynthesis using sunlight in the daytime has to produce enough sugar or starch as food reserves to allow the plant to respire both by day and night, as well as having some extra for growth.

Important points Plants perform photosynthesis by day but not at night to make food Plants are living things and so respire by day and night using up food to release energy for life processes Photosynthesis usually results in a net food gain, once respiration has been accounted for. (plant will grow) Plants that lose their leaves in winter (Deciduous trees) store enough food from photosynthesis produced during summer to last them over winter and provide energy reserves for new growth in spring.

Differences between Photosynthesis and Respiration. Photosynthesis Respiration produces food stores energy uses water uses carbon dioxide releases oxygen occurs in sunlight uses food releases energy produces water produces carbon dioxide uses oxygen occurs in the dark as well as light