2.9.U1 Photosynthesis is the production of carbon compounds in cells using light energy.
State the chemical equation for photosynthesis.
2.9.U2 Visible light has a range of wavelengths with violet the shortest wavelength and red the longest.
Define visible light.
State the relationship between wavelength and energy.
State the range of wavelengths that fall within the visible spectrum.
2.9.U3 Chlorophyll absorbs red and blue light most effectively and reflects green light more than other colours.
State the primary and accessory pigments found in chloroplasts.
Explain why plants are green.
2.9.U4 Oxygen is produced in photosynthesis from the photolysis of water.
State the equation for photolysis.
State that the oxygen produced in photolysis is a waste product of photosynthesis.
2.9.U5 Energy is needed to produce carbohydrates and other carbon compounds from carbon dioxide.
State the energy conversion that occurs during photosynthesis.
2.9.U6 Temperature, light intensity and carbon dioxide concentration are possible limiting factors on the rate photosynthesis.
Define “limiting factor.”
Explain how the following factors limit the rate of photosynthesis:
2.9.A1 Changes to the Earth’s atmosphere, oceans and rock deposition due to photosynthesis.
State that (some) prokaryotes, algae and plants carry out photosynthesis.
Define and state evidence for the “Great Oxidation Event.”
2.9.S1 Drawing an absorption spectrum for chlorophyll and an action spectrum for photosynthesis.
Distinguish between an action spectrum and an absorption spectrum.
Describe the shape of the curve for an absorption spectrum.
Describe the shape of the curve for an action spectrum.
2.9.S2 Design an experiment to investigate limiting factors on photosynthesis.
List mechanism for measuring the rate of photosynthesis.
2.9.S3 Separation of photosynthetic pigments by chromatograph. (Practical 4)
Outline the process of separating pigments using chromatography
Calculate the Rf value for pigments using pigment chromatography.
2.9.NOS Experimental design- controlling relevant variables in photosynthesis experiments is essential.
Define independent variable, controlled variable and responding variable.
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