PLANT PROCESS

1. Photosynthesis

2. Topicstobe
coveredtoday
Introduction
Whatare
autotrophs
Whatis
photosynthesis
Chemicalequation
ofphotosynthesis
Factorsaffecting
photosynthesis
Importanceof
photosynthesis

3. Alllivingorganismsrequireenergy.
• Forgrowth
• Formovement
• Tocarryoutalllifeactivities
• Weget thisenergy fromfood
• Wheredowe getthisfood andenergy from??

5. AutotrophsorProducers
• Plantsarecalledautotrophs becausethey
maketheir ownfood.
• Theprocess bywhichplantsmaketheirown
food iscalled photosynthesis.

7. Howplantsmaketheirfood
Whatweuse Whattheyuse

8. Thekitchenofplants:TheLeaf

9. Chemicalequationofphotosynthesis

10. Factorsaffectingphotosynthesis
1. Lightintensity:Increasedlightintensityresultsina
higherrateof photosynthesis.Ontheotherhandlower
lightintensityresultsinlowerrateofphotosynthesis.
2. Theconcentrationof carbondioxide:Higherlevelof
carbon dioxidehelpsinincreasingrateof
photosynthesis.
3. Temperature:Forefficient executionofphotosynthesis, it
isimportanttohaveanoptimumtemperature i.e.
between 250C to350C.
4. Water:Aswaterisanimportantfactorinphotosynthesis,
itsdeficiency canleadtoproblemsintheintakeof carbon
dioxide.Thescarcityofwaterleadstotherefusalof
stomatalopeningtoretainthewatertheyhavestored
inside.

12. 1.Itisessentialfortheexistenceof
alllifeontheearth.Itservesa
crucialroleinthefood chain–the
plantscreatetheirfood usingthis
process,therebyformingthe
primaryproducers.
3.Photosynthesisisa processwhich
isresponsibleformaintaininga
balanceofoxygenandcarbon
dioxide levelintheair.
2.Itisalsoresponsibleforthe
production ofoxygen –whichis
requiredbyalllivingorganisms for
theirsurvival.

13. Worksheet : ( to be done in the notebook)
Q1. Objective questions.
1. Stomata are present of the surface of ________.
2. ____ and ___ are raw materials of photosynthesis process and _____ is the product
of this process.
3. The colour of the leaf is green due to the presence of ________.
4. The plant absorbs water from ______.
5. The plant gets carbon dioxide from ______.
6. The by-product of photosynthesis process is _____.
Short questions:
1. Define autotrophs.
2. Define hetertrophs.
3. Write chemical and word equation for photosynthesis process.
4. Which is the main product and by-product of photosynthesis?
5. From where the plant gets water for the process of photosynthesis?
6. Which are the raw materials required for photosynthesis?
Long questions :
1. What is photosynthesis? Explain the process of photosynthesis in brief.
2. What is significance of photosynthesis process?
3. Explain the factors influencing photosynthesis process.
4. What are different stages of photosynthesis?