snc1d u1 lesson 4 nutrient cycles and energy flow 2

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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


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