Photosynthesis & Cellular Respiration

Terms to know:• Reactants- these are the substances

needed for the reaction to take place• Products- these are the substances

produced during the reaction• Equation- a written representation of

a chemical reaction that separates the reactants and products

Discovery of Photosynthesis:

Look for:• How photosynthesis was discovered.

• http://www.neok12.com/php/watch.php?v=zX425c515e42660904500606&t=Photosynthesis

What is Photosynthesis?

The process of photosynthesis in which plants change carbon dioxide, water, and sunlight to glucose.

WORD EQUATION

REACTANTSREACTANTS PRODUCTSPRODUCTS

SYMBOL EQUATION

Photosynthesis Description:• Carbon dioxide (CO2), water (H2O), and

sunlight enter the leaves through holes called stomata.

• These substances are moved through the plants in tubes called xylem and phloem.

• Takes place in the chloroplasts using chlorophyll, the green pigment in plants.

• Occurs in plants and some algae.

Photosynthesis Description (cont)

•Plants need light energy, CO2, and H2O; these are the reactants

•Plants produce glucose (sugar) and oxygen; these are the products

Assignment- Due Thursday

• Please choose one of the following-– An acronym describing photosynthesis.– A poem describing photosynthesis.– A song describing photosynthesis.

Acronym-

Produces oxygenLight energy is usedAll plantsNeeds carbon dioxideTransported food is done in the

phloem

Poem-http://meg-sci-lpenhs.blogspot.com/2007/08/poem-on-photosynthesis.html

Provides basic source of energy,organisms depend on this virtually,

in making food this is a need,known as photosynthesis indeed.

one of the most important biochemical processes,

usually occurs in plant leaves and stems,a structure in the cells known as chloroplast,

this is where photosynthesis ends and starts.

Song-http://www.educationalrap.com/song/photosynthesis.html

ChorusPhotosynthesis, let’s get into this

Discussion of sunlight, and transfer of energy.Photosynthesis, let’s get into this

Process of chemical reactions and synergy.

Verse IPlants take water, sun, and CO2,

to make glucose: the sugar that they use for foodThey also put oxygen into the air

So we can share, because oxygen is everywhereThe energy transforms from solar to chemical

All the time, everywhere, the process is identicalIn every plant, and every treeEnabling all living things to be

Cellular Respiration Video:

• Listen for:• How cellular respiration gets its name.• The two molecules that combine in the

process.

• http://www.neok12.com/php/watch.php?v=zX787d585f475a015b5c7c06&t=Photosynthesis

Describe Cellular Respiration

• The breakdown of glucose molecules to release energy

• Takes place in all living things

GlucoseGlucose ++ OxygenOxygen Carbon DioxideCarbon Dioxide ++ WaterWater + + ATPATP

WORD EQUATION

Energy

CC66HH1212OO66 + 6O + 6O22 6CO 6CO22 + 6H + 6H22O + ATPO + ATP

REACTANTSREACTANTS PRODUCTSPRODUCTS

SYMBOL EQUATION

Describe Cellular Respiration?

• The food (glucose) is broken down to give each organism energy.

• This process is cellular respiration.

• This process occurs in the mitochondria.

Description of Cellular Respiration

• Organisms need glucose and oxygen; these are the reactants.

• Organisms produce CO2, H20, and ATP; these are the products

Assignment- Due Friday

– Complete the recipe card describing cellular respiration

Exit Slip:• Answer must be written in a complete

sentence (capital letter, punctuation mark, and must make sense).

• How are the processes of photosynthesis and cellular respiration related?

Learn more about photosynthesis at:

http://www.ftexploring.com/me/photosyn1.html

Read how photosynthesis & respiration are related:

http://www.usoe.k12.ut.us/curr/science/sciber00/8th/energy/sciber/photosyn.htm

Why is this important to us?

• We cannot make our own food (glucose), we must get our food from plants.

• Plants are the first step in the food chain.• The oxygen released during photosynthesis

is necessary for all living things.