![]() ![]() Use the camera icon to copy and paste your graph to this answer sheet.Ģ) How does the average value of Number of Oxygen Bubbles change as the distance of the Elodea plant from the light source increases? Look to the graph you made above for specifics to use in this answer.ģ) Why does the distance from the light source change the amount of oxygen bubbles observed?Ĥ) The number of bubbles produced in this experiment were the dependent variable that we measured (by counting) and indicate that photosynthesis is occurring. Click the Descriptive stats check box on the right to add the mean and standard deviation for each treatment to your graph. ![]() You will first need to save your own copy of this dataset to do this.ġ) Make a graph showing Number of Oxygen Bubbles on the Y-Axis and Distance Treatment on the X-axis. You can click the edit button to the right of this document to begin editing your own copy of this document in Google Docs. Each row in the dataset is a single observation recorded and each column represents a different variable. Part (b) of this figure was taken with a polarizing filter and part (a) was not. 1: These two photographs of a river show the effect of a polarizing filter in reducing glare in light reflected from the surface of water. Their data are recorded in this class dataset. The answers to these questions are related to the wave character of light. Students counted the number of oxygen bubbles what were produced by the plant during a two minute period.Įach of five groups of students repeated this experiment with the light source at five different distances (10cm, 20cm, 30cm, 40cm, 50cm). A small desk lamp was used as a light source while all other sources of light in the classroom were darkened. A freshly cut stem of Elodea was placed in a beaker of water. The equation for photosynthesis is as follows: Carbon dioxide (CO 2) + water (H 2 O) sugar (C 6 H 12 O 6) + oxygen (O 2) + water (H 2 O) The plant uses the sugar it produces through photosynthesis to grow and produce more leaves, stems, and rootsthe biomass of the plant. This classroom experiment used an aquatic plant called Elodea that commonly grows in lakes and ponds and is sold in pet stores for use in home aquariums. How does light intensity affect the rate of photosynthesis?īy analyzing data from a classic lab experiment we can draw some conclusions about the effect of light intensity (or strength) on photosynthesis. If one of those three inputs (water, carbon dioxide, or light) is in short supply, then photosynthesis will slow down or even stop. Green plants use light energy to produce their own food with photosynthesis You may have already learned that plants require water and carbon dioxide and light for photosynthesis and produce oxygen and glucose sugar in the process. ![]() What do you notice in this short video (1:38)? What do you think is causing the bubbles to form? Why do you think that? ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |