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Photosynthesis 7th grade

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Joey Bell

on 27 March 2013

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Transcript of Photosynthesis 7th grade

Oxygen (O) Raw materials needed for photosynthesis to occur 1) Water H2O Photosynthesis The process by which plants and some other organisms (like algae) capture light energy and use it to make food from carbon dioxide and water. Formula for Photosynthesis (6) H2O + (6) CO2 -------> C6H12O6 + (6) O2 Glucose C6H12O6 -Glucose is a type of sugar that provides us with energy.

-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
------> yields/produces
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
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