Chloroplast and Thylakoid In photosynthetic bacteria, the proteins that gather light for photosynthesis are embedded in cell membranes. In its simplest form, this involves the membrane surrounding the cell itself. A typical plant cell contains about 10 to chloroplasts. The chloroplast is enclosed by a membrane.
Ideally, a teacher would have no more than twenty four students to coach through this activity. A student will have prior knowledge as to the equation describing the photosynthetic process as well as having a basic understanding of the scientific method.
The lab could be used in a unit on, the scientific method, a photosynthetic unit or in a unit on environmental problems global climate change and its affect on plants. Teacher and students will review the equation describing photosynthesis. What types of organisms undergo photosynthesis?
Discussion will include the ideas that not all plants photosynthesize at the same rate. Brainstorming will bring out possible reasons and variables that would influence photosynthesis. Leaf structures will be named and discussion will relate these structures to the processes of photosynthesis that occur in each.
This would be the time to give examples of how some questions scientists raise are not testable. Students should be thinking about the question they will raise about the photosynthesis experiment and if an investigation can be designed to test their question.
The teacher can now review what a hypothesis is and how to write a specific, testable hypothesis. Basic Materials needed for lab group of students: The teacher will now demonstrate to students the basic technique that will be used to measure the rate of photosynthesis.
All students will be guided to use this technique. They can now practice this technique see experimental design and the following web site http: Pick a testable question to answer when doing the experiment. Give students time to design experiment and do a trial run. Class discussion will connect the lab to world issues; food availability, global climate change.
Teaching Notes and Tips 1 Use fresh spinach leaves, soak them in water overnight at about 4 degrees C. This increases turgor pressure and minimizes "limp" leaves. Use only the firm, dark green areas of the leaf.
Avoid major veins or damaged areas. Too little vacuum treatment causes the disks not to sink, too much vacuum treatment may kill the cells.
Assessment Two rubrics will be used to assess student lab report sample of report included below and student participation.
A written exam will be used to determine if a student has met the goals of the activity.
Where in a leaf does photosynthesis mainly occur? How does carbon dioxide get into a leaf? How does water get into a leaf from the roots? Obtain a prepared slide of a leaf cross section x-section. Using x make a sketch of what you see. Use the text book or internet to label the following tissues; Upper epidermis, lower epidermis, palisade mesophyll, spongy mesophyll, vein label both xylem and phloemguard cells, stoma 1 In which of the labeled structures, does most of the photosynthesis occur?
Write out a balanced equation for photosynthesis: Experimental Design Your table will design an experiment to test how a selected variable affects the rate of photosynthesis. Follow the information below to make "sinking plant disks".1.
Describe the process of photosynthesis. You may write an equation, draw a picture, or write an explanation. List all of the products and reactants.5/5(1). 1. Describe the process of photosynthesis.
You may write an equation, draw a picture, or write an explanation. List all of the products and reactants.5/5(1). Draw a palisade cell as shown in the video, showing the reactants and products of photosynthesis.
State two uses of the glucose produced in photosynthesis. Write the word equation for photosynthesis. The formula for photosynthesis is 6CO2 + 6H2O + light energy = C6H12O6 + 6O2.
In words, the equation translates to the combining of water, carbon dioxide and light energy to produce glucose and oxygen. Photosynthesis is a complex natural process that .
The equation for photosynthesis states that the combination of carbon dioxide, water and light energy produces a carbohydrate (glucose) and oxygen. The chemical formula is 6CO2 + 6H2O + light energy = C6H12O6 + 6O2.
Photosynthesis is the process whereby plants using light energy from the sun convert carbon dioxide and water to glucose sugar and oxygen gas through a series of reactions. The overall equation for photosynthesis is.