SPINACH DISK GRAPH TITLE SERIES

Thus, it is not only crucial for plants, but also for all organisms that rely on oxygen for their survival. Photosynthesis is responsible for replenishing Earth's atmosphere with oxygen that we breathe. These sugars can be stored for later use by the plant as an energy source to fuel its metabolism and growth. In the Calvin cycle, the plants take carbon dioxide (CO 2) from the air and use it to ultimately make sugars such as glucose or sucrose.

SPINACH DISK GRAPH TITLE SERIES

In this step, the two energy-carrier molecules, NADPH and ATP, are utilized in a series of chemical reactions called the Calvin cycle. The next stage is light-independent and is often referred to as the dark reaction. At the same time, water is split into oxygen (O 2) and protons (H +). During the first part of photosynthesis-the light-dependent reaction-chlorophyll and other pigments harness the light energy to produce NADPH and ATP, which are two types of energy-carrier molecules.

This is why leaves with chlorophyll usually appear green. Chlorophyll does not absorb light in the green spectrum of light but reflects it instead. Chlorophyll is one of the pigments that can absorb light in the blue and red spectrum from the visible light spectrum. The chloroplasts contain special pigments that react to light. Photosynthesis takes place in the chloroplasts within the plant's cells. During photosynthesis, plants convert water (H 2O), carbon dioxide (CO 2), and light into oxygen (O 2) and sugars like glucose (C 6H 12O 6). Water does not ‘want’ or ‘need’ to go…ġ8 Citation of resources MLA Format Examples of unacceptable formats: 1) Dr.Figure 1. Datum is singular Diffusion and osmosis are based on the random movement of molecules. Give actual data when describing the results This study shows (not proves) Data is plural, e.g., The data were graphed.

You will discuss what the data mean in your Conclusion section. (which graphs specifically?) Include the table of the class data Chi-square analysis of class data Include a brief summary of results from all your graphs and the table. Is there a difference in the concentration of stomata? What is your hypothesis and what are your predictions?ġ3 Class Data Group CO2 No CO2 1 11 10 2 4 3 8 9 5 14 6 Total 49 33 Record your group’s calculated rate of photosynthesis (# of disks floating/min)ġ4 Chi-Square CO2 No Co2 Observed 49 33 Expected 41 Punch out 15 disks Make them sink Record the # of disks floating (every 1 min) Run your experiment for 20 minutes!ġ2 Observe the stomata Compare the top and bottom sides of spinach leaves. I will complete the control.ġ0 Exercise 1: Measuring photosynthesis  Spinach leaf disks experimentĬomplete the worksheet individually Graph your group’s results Title your graph and include units! Provide a caption for the graph Calculate the rate of photosynthesis (# of disks floating / min) Use the class data to answer the remaining questions Unitsġ1 Methods 1 2 3 Run your experiment for 20 minutes! 0.2 % What variable must we maintain constant? Hypothesis and predictions? CONTROLS?  0.2 % CO2 placed in the dark. Work in pairs, but complete the worksheet individually NaHCO3 + H2O  NaOH + H2O + CO2 Variable one: Concentration of dissolved CO2 0 % vs. Work in groups, but complete the worksheet individually NaHCO3 + H2O  NaOH + H2O + CO2 Variable one: Concentration of dissolved CO2 0 % vs % What variable must we maintain constant? Hypothesis and predictions? CONTROLS?ĩ Exercise 1: Measuring photosynthesis  Spinach leaf disks experiment

Presentation on theme: 'Photosynthesis.'- Presentation transcript:Ĥ Photopigments absorb specific wavelengths Photosynthesis is most efficient using red and blue wavelengthsĥ The stomata Stomata control the diffusion of CO2, H20, and O2 in and out of the leaf Plants open and close their stomata during the daytime in response to changing conditions: - light intensity - humidity - CO2 concentration The basic mechanism involves regulation of osmotic pressureĦ Photosynthesis on a global level…Where is it happening?Ģ005 NASA imaging How can we measure photosynthesis rates and what sort of events can effect this?ħ Exercise 1: Measuring photosynthesis  Spinach leaf disks experimentĨ Exercise 1: Measuring photosynthesis  Spinach leaf disks experiment

Spinach disk graph title