Download Oxygen and Carbon Dioxide

Oxygen and Carbon
Dioxide
Photosynthesis
and
Respiration
Photosynthesis
• Who provides the oxygen you
breathe?
– PLANTS!
• Carry out PHOTOSYNTHESIS
Photosynthesis
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Definition: a process during which energy
from the Sun is used to change carbon
dioxide and water into glucose and oxygen
Glucose: provides plants with energy
Oxygen: released into atmosphere
Carbon Dioxide + water + energy glucose + oxygen
Respiration
• Definition: process through which
oxygen and glucose are combined to
produce carbon dioxide and water
– Stored energy is released
– MOST ORGNISMS ARE ABLE TO
USE THE ENERGY IN FOOD
BECAUSE OF THIS!!!
Respiration
»Chemical equation
– Glucose + oxygen  carbon dioxide + water + energy
Compare and Contrast
• Respiration:
– Glucose + oxygen  carbon dioxide + water + energy
• Photosynthesis:
– Carbon Dioxide + water + energy glucose + oxygen
Carbon cycle
• Carbon goes through the process mostly
through gas known as CARBON
DIOXIDE
– Plants take in carbon dioxide during
photosynthesis
• Carbon goes to the glucose in the plant
• Organism that eats the plant gets the glucose
• Organism gets rid of the Carbon…
• BRAIN POP!!
Carbon Cycle
–Death of organisms:
• Decomposition occurs:
–Bacteria and fungi break down
organic matter
»Release carbon!
Carbon Cycle
–Fossil Fuels:
burning them
releases carbon
into the
atmosphere
Oxygen Cycle
– Oxygen produced during photosynthesis
• Consumed during respiration
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Examples: water vapor
Combustion
Rusting
Rocks weathering
Disrupting the Cycles
– HUMANS!!!
• Adding too much carbon to atmosphere:
– Burning fossil fuels: natural gas, coal, and oil
• Deforestation: cutting down forests
Homework!
• 5-1 SG/Cycles wkst
• Due Tomorrow!!!!