Date post: | 17-Jan-2017 |
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Education |
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PhotosynthesisGrade 3
The student will:
Learn what photosynthesis is and how it helps plants.
Learn what a plant needs for photosynthesis.
What is photosynthesis? Plants make their own food. This
process is called photosynthesis.
Where does photosynthesis occur? Photosynthesis occurs in the
leaves of a plant.
PlantsPlants
Autotrophs:Autotrophs: self-producers. Location:
1. Leavesa. stomab. mesophyll cells
StomaMesophyllCell
Chloroplast
Stomata (stoma)Stomata (stoma)
PoresPores in a plant’s cuticle through which waterwater and gasesgases are exchanged between the plant and the atmosphere.
Guard CellGuard CellCarbon Dioxide (CO2)
Oxygen (O2)
Mesophyll CellMesophyll Cell
Cell Wall
Nucleus
Chloroplast
Central Vacuole
ChloroplastChloroplast
OrganelleOrganelle where photosynthesisphotosynthesis takes place.
GranumThylakoidStroma
Outer MembraneInner Membrane
What is needed for photosynthesis to occur? Light is needed for photosynthesis to
occur. The plant’s leaves use the light to make a sugar called glucose.
Why do plants need glucose? Glucose is the food for the plant. It
gives the plant energy to grow.
How much glucose does a plant make? Plants make enough glucose to be used
during the night and on cloudy days when they don’t get sunlight. The extra glucose is stored in the plant’s leaves and other parts.
How does photosynthesis help us? During the process of photosynthesis,
oxygen is produced. We use this oxygen to breathe.