Post on 04-Jan-2016
Photosynthesis and Respiration
What is Photosynthesis??• Plants using sunlight (energy), carbon dioxide,
and water to make food and oxygen
The 2 stages of photosynthesis are:
1) Capturing the sun’s energy
The 2 stages of photosynthesis are:
2) Using the sun’s energy to make food
What 5 materials does Photosynthesis Require???
1. Sunlight
2. Pigments
a. Molecules that absorb sunlight (in the chloroplast the pigment is primarily chlorophyll)
What Does Photosynthesis Require???
3. The Chloroplasts (in the leaves), where photosynthesis takes place!
What Does Photosynthesis Require???
4. Carbon Dioxidea. Taken in through
openings in the leaves called stomata
5. WaterTaken in through roots
in the ground
Photosynthesis Equation
• In words: + +
+ +
LIGHT
LIGHT6 6 6
Carbon Dioxide
Water Glucose(Food)(Sugar)
Oxygen
CO2 H2O C6H12O6 O2
Why is it important?
• Most organisms get their energy in some way from the process of photosynthesis– Either by consuming plants or eating
something that consumed plants
Can you think of any place in the world where photosynthesis
doesn’t occur?
Homework
ChloroplastMaterials: Products:
WaterSunlightCarbon Dioxide
SugarOxygen
Respiration
What is Breathing?
• Moving air into and out of your lungs, as your diaphragm muscle moves up and down in your chest
What is Respiration?
Making ATP (energy) by breaking down food/sugar inside of your cells all over your body
* EVERY LIVING THING RESPIRES… even plants
So…how is Respiration different than Breathing?
Breathing occurs at the organism level of organization, respiration occurs at the cell level
2 Types of Respiration
1. Cellular (Aerobic) respiration: requires Oxygen
2. Fermentation (Anaerobic respiration): Does NOT require Oxygen
What does Cellular Respiration Require?
1. Glucose (food or sugar)
- heterotrophs: organisms that eat their food
- autotrophs: organisms that make their own food
2. Oxygen- animals: take in through breathing
- plants: take in through from stomata in leaves
What does Aerobic Respiration Require?
3. Mitochondria– where
respiration takes place
Aerobic Respiration Equation
• In words: + + +
+ + +
66 6
Carbon Dioxide
WaterGlucose Oxygen
CO2 H2OC6H12O6 O2
Energy
ATP
What do you notice about the Cellular (Aerobic) Respiration
Equation?Does it look kind of familiar????
Respiration:Sugar + Oxygen = Carbon Dioxide + Water + Energy
(ATP)
Photosynthesis:Carbon Dioxide + Water + Energy= Sugar + Oxygen
(Sunlight)
Cellular Respiration
MitochondriaMaterials: Products:
SugarOxygen
Carbon DioxideWaterATP
Fermentation(does not require oxygen)
• Lactic acid fermentation: – Occurs when your muscles are not getting
enough oxygen, so they begin to have a burning sensation (b/c of lactic acid) and fatigue
Fermentation
• Carbon Dioxide fermentation:– Bacteria in cheese
or yeast in bread release carbon dioxide and cause the bread to rise and the holes in the cheese