John Bowne High School







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Photosynthesis is directly affected by various environmental factors. Light is the most obvious of the factors that affect photosynthesis. The rate of photosynthesis generally goes up as the intensity of light increases. That is because more and more of the pigments in the plant are being used. However, when all of the pigments are in use, the plant cannot absorb any more light. Then the rate of photosynthesis levels off. The concentration of carbon dioxide affects the rate of photosynthesis in a similar manner. The rate increases until a certain concentration of carbon dioxide is present. Even if this concentration is exceeded, the plant cannot take up and use carbon dioxide more quickly. So the rate of photosynthesis levels off.

Photosynthesis is a metabolic process. Like all other metabolic processes, photosynthesis includes many chemical reactions that are mediated by enzymes. Enzymes operate properly only within certain temperature ranges. Therefore, photosynthesis is most efficient within a certain range of temperatures.

1. Write a sentence that identifies the main idea of this passage.

2. What effect would a sudden decrease in light intensity have on the rate of photosynthesis of a particular plant?

3. At what point does light intensity have little effect on the photosynthesis rate of a plant?

4. A study showed that the photosynthesis rate of a plant continually increased over a certain period. Then the rate leveled off. During the study, light intensity and temperature remained constant. The only variable was the concentration of carbon dioxide surrounding the plant. What was the cause of this variation in photosynthesis rate?

5. In another study, the photosynthesis rate of a plant sharply decreased as air temperature sharply decreased. During this study, light intensity and concentration of carbon dioxide remained constant. What can you conclude about this variation?

6. Which of the following does not affect the photosynthesis rate of a plant?

a. air temperature

b. soil type

c. light intensity

d. carbon dioxide concentration

Lesson Plan

Aim: How does photosynthesis occur in the chloroplast?

Standard 4

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Common Core Learning Standards for Literacy in History/Social Studies, Science, and Technical Subjects.

RST.11-12.4, RST.11-12.7, WHST.11-12.2a, WHST.11-12d, WHST.11-12.4.

INSTRUCTIONAL MODIFICATIONS FOR ELL/SP, ED, STUDENTS (IF APPLICABLE)

1-Provide dictionaries/glossaries

2-Provide alternate reading/writing material to differentiate task

3-Provide extra scaffolding for vocabulary attainment

4-Provide extra wait time for oral response to questions

5-Use of graphic organizers

6-Use more visuals through technology

- Instructional objectives: In addition to being provided with the opportunity to read, write, and speak in order to increase literacy….SWBAT

Objectives:

-Explain the main function of the organelle chloroplast

-Explain the green pigment called chlorophyll in photosynthesis

-Explain the photosynthesis in chloroplast

-Explain the raw materials of the reactants needed in photosynthesis (ex) carbon dioxide, water,& sun light

-Explain the product of photosynthesis (ex) carbohydrate & oxygen

-Explain monosaccharide & polysaccharide.

Key questions

-What is a chloroplast?

-What type of cells contained chloroplast?

-Explain why plants are the color green

-Explain the main function of the green pigment called chlorophyll

-What type of molecules does the chloroplast produce?

-What is the product of photosynthesis use for?

-Explain the difference between mitochondria & chloroplast?

Assessing students’ prior knowledge, understanding, and misconception: (5 min)

Do Now: Write a sentence or more

Explain why photosynthesis is necessary for most of the life on this planet.

Motivation/Context: Show short video:









Introduction of understanding (associate the new understanding with prior knowledge) (10-15 min)

Reading comprehension individually & analyzing chemical equation on page 1 (5min)

or

Reading comprehension out loud & analyzing chemical equation on page 1 (5 min)

Development of lesson: (5-8 min)

Answer questions from the reading comprehension section on page 2

Check Point(s) Have students report to each other and/or to the entire class what they have learned as a check on the progress of the teaching by writing on the smart-board. Ask key questions during the check point. (5-8 min)

Further development of lesson:

Reading comprehension on page 3 with questions

Check Point(s) Have students report to each other and/or to the entire class what they have learned as a check on the progress of the teaching by writing on the smart-board. Ask key questions during the check point. (5-8 min)

Homework:



Summarize what was seen in the videos

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