Students are given the following 3 handouts: (SP6 - Constructing Scientific Explanations)
1. Claims and Evidence
2. Making a Claim Based on Evidence T Chart
3. Photosynthesis Performance Task
1. Claims and Evidence includes 4 pieces of evidence that students can use support to fill out their claims, evidence, reasoning table at the bottom of each page.
- Evidence 1 has an excerpt from Priestly on his experiments describing his observations that helped him develop the claim that plants produce oxygen during photosynthesis. Along with his quotes it includes a data table of his experiment that students can analyze and develop the claim like Priestly that plants produce oxygen during photosynthesis.
- Evidence 2 has an excerpt from Ingenhousz from his experiments describing his observations that helped him develop the claim that light is necessary for photosynthesis to occur. Along with his quotes it includes a data table of his experiments that students can analyze to develop claim like Ingenhousz that plants need light for photosynthesis to occur.
- Evidence 3 is a diagram that illustrates that carbon dioxide is a required reactant for photosynthesis to occur.
- Evidence 4 is a diagram that illustrates that light is needed in order for leaf to produce sugar and store it as starch during photosynthesis.
For each piece of Evidence students are required to come up with at least 1 claim, 1 evidence artifact, and 1 reasoning artifact. These 4 CER (Claim, Evidence, Reasoning) will be included in students' Photosynthesis Performance Task.
2. Making a Claim Based on Evidence T Chart (glmyna.kvalitne.cz) is a T-chart that allows students to write and organize their claims and evidence for their Photosynthesis Performance Task. It's a good idea for students to record (write) the source of their evidence (Evidence 1, 2, 3, 4).
3. Photosynthesis Performance Task (MS-LS)has directions for assignment along with samples of appropriate CER's (Claim, Evidence, Reasoning). The second page includes general outline for essay with specific instructions on what information should be included in each section. The final page includes the assignment rubric.
Photosynthesis Process for Kids Simplified for Easy Understanding
The leaves of a plant act as the primary site where the entire process occurs. When sunlight falls on leaves, chlorophyll―a green-colored pigment that occurs in photosynthetic plants―captures the energy in it, and stores it for further use. (The leaves owe their characteristic green color to the presence of this green pigment in them.) The energy, which is captured, is eventually used to convert water into hydrogen and oxygen. While hydrogen is combined with carbon dioxide and used by the plant to produce its food, oxygen―being a by-product of the entire process―is released into the atmosphere through the stomata. The entire process can be put forth in the form on an equation: 6CO2 + 6H2O + Light energy → C6H12O6 + 6O2