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Photosynthesis vs. Respiration

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Page 1: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Photosynthesis vs. Respiration

Page 2: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Where Does Energy Come From?

Energy is stored in food!!!

ONLY Plants are autotrophs—they make their own food from sunlight.

Animals are heterotrophs- cannot make their own food, must eat plants for energy.

Page 3: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Why Energy? Energy- ability to cause change All cell functions need energy! To move, to

breath, to reproduce, to digest, etc.

All energy in living things is as chemical bonds

Main energy source for all life = THE SUN

Page 4: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

The energy molecules

ATP (adenosine tri-phosphate)

Made in mitochondria

Page 5: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

ATP vs. ADP Break chemical bonds = RELEASE energy

Adding chemical bonds = STORE energy

Page 6: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Photosynthesis Reaction/Equation

6 CO2 + 6 H2O +sunlight energy = C6H12O6 + 6 O2

trapped by chlorophyll

Carbon Dioxide + Water + Sunlight = Glucose + Oxygen

2 phases (parts): Light -dependent- needs light, oxygen released Light- independent- no light needed, makes sugar

Page 7: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Photosynthesis Photo: light Synthesis: make something

Process by which plant cells use light energy to make food

Where: in plants, chloroplasts Who: Chlorophyll- pigment

that traps sun’s light energy in plants ONLY

Page 8: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Cellular Respiration The opposite of photosynthesis! Instead of making food, we break down food

plants made to release energy Takes place in mitochondria of all living things

C6H12O6 + 6 O2 = 6 CO2 + 6 H2O + ATP

Page 9: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Bellringer 11/112/09

4 Minutes3 Minutes2 Minutes1 Minute30 Seconds10987654321Time’s Up!

1.Write the equation for photosynthesis2.Write the equation for cellular

respiration!

Use your notes from Friday/Monday!

Reminders: HW #10 due Fri! LAB FEE NOW!

Page 10: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Cellular Respiration Stages

3 Stages (parts): Glycolysis- anaerobic Citric Acid Cycle (Krebs Cycle)- aerobic ETC (Electron Transport Chain)- aerobic

Page 11: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Aerobic respiration -energy produced using oxygen

Anaerobic respiration - also called Fermentation - energy without oxygen

Page 12: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Fermentation1. Lactic Acid Fermentation-

energy without oxygen,

ex: muscles while running

2. Alcoholic Fermentation - yeast, bacteria, this is how we make beer, cheese, bread, vinegar, wine and cider

Page 13: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Photosynthesis vs. RespirationPhotosynthesis RespirationFood made Food broken down

Energy from sunlight stored in glucose

Stored energy in glucose released

CO2 taken in CO2 and H2O given off

O2 given off O2 taken in

In the presence of chlorophyll- plants only

Occurs in all living organisms

Light needed No light neededIn Chloroplasts In Mitochondria

Page 14: Photosynthesis vs. Respiration. Where Does Energy Come From? Energy is stored in food!!! Energy is stored in food!!! ONLY Plants are autotrophs—they make

Photosynthesis vs. Respiration


Energy enters an ecosystem through the autotrophs Autotrophs then pass the energy on to the different levels of heterotrophs (consumers) through ingestion

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AUTOTROPHS All organisms require a source of energy. There are two types of autotrophs: 1. Chemoautotrophs (or chemotrophic autotroph), 2. Photoautotrophs

PHOTOSYNTHESIS: USING LIGHT TO MAKE FOOD. PHOTOSYNTHESIS: USING LIGHT ENERGY TO MAKE FOOD HETEROTROPHS VS AUTOTROPHS? AUTOTROPHS (A.K.A ?) – DEFINITION?

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CHARACTERISTICS OF CLASSIFICATION. 1. HOW ORGANISMS GET ENERGY Autotrophs Organisms that make their own food are called autotrophs. Auto- means “self”,

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4.1 EnergyforLife - · PDF filePhotosynthesis and Cellular Respiration Worksheets ... Autotrophs are organisms that make their own food. Most autotrophs use the energy in sunlight

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Chapter 8 Photosynthesis. I./2. Some organisms are producers and others are consumers. a)Autotrophs a)Autotrophs make their own energy from inorganic

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PHOTOSYNTHESIS Providing Energy for Life. Do you remember food web terminology? Autotrophs = producers Autotrophs = producers Photoautotrophs Photoautotrophs

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