Photosynthesis, Photosynthesis, Respiration and Respiration and TranspirationTranspiration

SC Standard 6-2.7SC Standard 6-2.7

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Equation for PhotosynthesisEquation for Photosynthesis

6 CO6 CO22+ 6 H+ 6 H22O → CO → C66HH1212OO66 + 6 O + 6 O22

carbon water light energy sugar oxygencarbon water light energy sugar oxygen

dioxide &dioxide &

chlorophyllchlorophyll

PhotosynthesisPhotosynthesis

Photosynthesis:Photosynthesis: This is the process by which plants This is the process by which plants

make their own make their own foodfood Photosynthesis takes place in the Photosynthesis takes place in the

leafleaf!! ChloroplastsChloroplasts are found in the cells of are found in the cells of

the leaf and contain the leaf and contain chlorophyll chlorophyll ( a ( a green pigment that absorbs the light green pigment that absorbs the light energy from the sun)energy from the sun)

Sunlight Sunlight is used to provide the is used to provide the energy necessary for energy necessary for photosynthesisphotosynthesis to take place to take place

Plants use Plants use carbon dioxide gas carbon dioxide gas from the air and from the air and waterwater taken in taken in through the roots to make through the roots to make sugar sugar (food)(food)

OxygenOxygen is produced during the is produced during the process of photosynthesisprocess of photosynthesis

The The oxygen is released oxygen is released into the into the air, through openings, or pores, in air, through openings, or pores, in the leaf called the leaf called stomatastomata..

Photosynthesis provides the Photosynthesis provides the oxygenoxygen in the atmosphere that in the atmosphere that most living organisms needmost living organisms need

RespirationRespiration

Food = EnergyFood = Energy

Equation for RespirationEquation for Respiration

CC66HH1212OO6 6 + 6 O+ 6 O22 → 6 CO → 6 CO2 2 + 6 H+ 6 H22O + O + EnergyEnergy

sugar oxygen carbon watersugar oxygen carbon water

dioxidedioxide

Respiration:Respiration:

The food (sugar) that is created The food (sugar) that is created through the process of through the process of photosynthesis is used to provide photosynthesis is used to provide energyenergy needed by the plants to needed by the plants to perform life functionsperform life functions

To get the energy, plants must break To get the energy, plants must break down the down the sugarsugar in a process called in a process called respirationrespiration

In this process, In this process, oxygen oxygen from the air from the air combines with the sugarcombines with the sugar

The sugar is then broken down into The sugar is then broken down into carbon dioxide and watercarbon dioxide and water

EnergyEnergy is then released is then released The released The released energyenergy can then be can then be

used by the plant to perform life used by the plant to perform life functionsfunctions

Carbon dioxide Carbon dioxide and and waterwater that are that are formed are given off through the formed are given off through the leaves (transpiration)leaves (transpiration)

Transpiration:Transpiration:

Some of the water taken in Some of the water taken in through the through the rootsroots of plant is used of plant is used in the process of photosynthesisin the process of photosynthesis

MOST of the MOST of the waterwater is lost through is lost through the the leavesleaves

The loss of The loss of waterwater through the through the leaves is called leaves is called transpirationtranspiration

Without a way to control Without a way to control transpiration, plants would whither transpiration, plants would whither up and up and diedie

Plants are able to control Plants are able to control transpiration by using transpiration by using guard cellsguard cells

Guard cells Guard cells are located on the are located on the bottom of the bottom of the leaf leaf and open and and open and close the close the stomata stomata (pores) (pores)

When the stomata are closed, no When the stomata are closed, no water is released.water is released.

TropismsTropisms

http://upload.wikimedia.org/wikipedia/commons/7/7d/Brunnichia_ovata_.jpghttp://upload.wikimedia.org/wikipedia/commons/7/7d/Brunnichia_ovata_.jpg

http://upload.wikimedia.org/wikipedia/commons/8/8e/Phototropism.jpghttp://upload.wikimedia.org/wikipedia/commons/8/8e/Phototropism.jpg

http://scienceprojectideasforkids.com/wp-content/uploads/2010/07/plant-upside-down-planting.jpghttp://scienceprojectideasforkids.com/wp-content/uploads/2010/07/plant-upside-down-planting.jpg

http://o.quizlet.com/kxXvps6OUB5gyh5TIlElgg_m.jpghttp://o.quizlet.com/kxXvps6OUB5gyh5TIlElgg_m.jpg

Standard- 6-2.8

Plant TropismsPlant Tropisms STIMULUSSTIMULUSA change in the environment that A change in the environment that

causes a response or reaction.causes a response or reaction. RESPONSERESPONSE The reply to the change in the The reply to the change in the

environment or stimulus.environment or stimulus. DORMANCYDORMANCY An inactive period when the An inactive period when the

plant or seed prepares for harsh conditionsplant or seed prepares for harsh conditions Dormancy allows various species to survive in Dormancy allows various species to survive in

particular environments.particular environments. Dormancy helps to ensure seeds will Dormancy helps to ensure seeds will

germinate when conditions are favorable for germinate when conditions are favorable for survival of the small seedlings.survival of the small seedlings.

TROPISMSTROPISMS Standard 6-2.8Standard 6-2.8

TROPISMSTROPISMSPlants can change their growth Plants can change their growth in response to their environment.in response to their environment.

PHOTOTROPISMPHOTOTROPISMThe way a plant grows or The way a plant grows or bends in response to bends in response to LIGHTLIGHT..

GRAVITROPISMGRAVITROPISMThe way a plant grows in The way a plant grows in response to response to GRAVITYGRAVITY..

HYDROTROPISMHYDROTROPISMThe way a plant grows in The way a plant grows in response to response to waterwater..

THIGMOTROPISMTHIGMOTROPISMThe way a plant grows The way a plant grows or bends in response to or bends in response to touchtouch..