Nutrient Cycles and Energy Flow 2 Lesson 4 August 27th, 2010

The Carbon Cycle (2 parts) 1. Photosynthesis 2. Cellular respiration All living things contain carbon Plants obtain carbon from the atmosphere Forests are carbon reservoirs as well as coal and oil deposits Oceans are also reservoirs for carbon dioxide

1. Photosynthesis The process that plants use to capture energy from sunlight Plants use chlorophyll to combine carbon dioxide from the air (CO2) and water (H­2O) to produce a sugar called glucose (C6H12O6) and oxygen gas (O2) Summary Carbon dioxide gas + water + sunlight  glucose + oxygen gas CO2 + H2O + sunlight  C6H12O6 + O2

Make a simple drawing of this

2. Cellular respiration The process both Plants and animals both to turn glucose into energy. The is almost the reverse of photosynthesis Summary Glucose + Oxygen gas  Carbon dioxide + Water + energy C6H12O6 + O2  CO2 + H2O + energy

Do not copy this – It is beyond grade 9

Photosynthesis + Cellular Respiration = Carbon Cycle

MSIP Read pages 34-39 Its Friday so I thought I would give you a break from the questions. There may be a little 5-10 min quiz on Monday