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Photosynthesis 7th grade
Transcript of Photosynthesis 7th grade
-Glucose is a common substance in nearly every form of life that produces energy.
-Plants use glucose as the primary part of the food that is stored.
-The process by which glucose is broken down is called respiration. -Respiration is the process which glucose is broken down.
-During respiration, the chemical energy stored in glucose is converted into other forms of energy, such as mechanical energy or thermal energy.
-Plants use some of this energy to grow, reproduce, and perform other life functions. Plants store unused energy as food.
-Plants go through both photosynthesis and respiration.
-Humans only go through respiration. We steal our glucose energy from plants. -What is needed for photosynthesis?
-What does photosynthesis produce?
-Can anyone remember the formula?
-What organelle is used to produce photosynthesis?
-What is the pigment inside this structure? What color does it reflect?
-What organisms go through photosynthesis?
-What organisms go through respiration? Photosynthesis 2) Sunlight 3) Carbon dioxide (CO2) -When you water a plant the water is absorbed through its roots.
-The water travels through the roots up long tubes that lead from the roots to other parts of the plant.
-These tubes are called xylem. -As animals breathe in oxygen they release carbon dioxide into the air.
-The plants take in the carbon dioxide that has been exhaled.
-Essentially, they recycle the carbon dioxide, using it for the process of photosynthesis.
-A plant has tiny openings called stomata. Stomata are located in the leaves of the plant. Carbon dioxide is taken into the plant through these openings. -As photosynthesis occurs, oxygen is released into the air since the plant no longer needs it.
-This is the oxygen we breathe.
-Plants recycle the oxygen through taking in carbon dioxide (which humans and other animals release when they exhale).
-Without photosynthesis we would
not have oxygen in the air. CO2 - Carbon Dioxide
H2O - water
O - Oxygen
C - Carbon
H - Hydrogen The chemical energy is produced by sunlight. This is why sunlight is important to the survival of plant life. "The equation reads:
Water and carbon dioxide combine in the presence of light energy to produce glucose and oxygen" pg. 208 Light energy Respiration -Photo means "light"
-Synthesis means "putting together" Chlorophyll and Chloroplasts -Chlorophyll is the most abundant pigment in most plants.
-It is found in the microscopic plant structures called chloroplasts.
-Chlorophyll is a green jelly like chemical that combines with all the other essential ingredients for photosynthesis. Warm-Up -Define photosynthesis
-What are the materials needed for it?
write it on Friday's slot Warm-up Day 2 -What are the 3 raw materials needed for Photosynthesis?
-What are the two products of Photosynthesis?
-Write the formula for Photosynthesis. (you may use your books) Bozeman Photosynthesis and Respiration Video