UNIT _____: Light and Pigments Name: _____________________

Essential Idea(s):

Specific wavelengths of light activate photosynthetic pigments.

2.9.U1: Photosynthesis is the production of carbon compounds in cells using light energy

∙ Define photosynthesis.

∙ State the chemical equation for 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.U3: Chlorophyll absorbs red and blue light most effectively and reflects green light more than other colours ∙ Define pigment.

∙ State the primary and accessory pigments found in chloroplasts.  

∙ Explain why plants are green.

2.9.S2: Separation of photosynthetic pigments by chromatography (Practical 4)  

∙ Outline the process of separating pigments using chromatography

∙ Calculate the Rf value for pigments using pigment chromatography.  

2.9.U2: Visible light has a range of wavelengths with violet the shortest wavelength and red the longest (400-700 nm = visible light. Don’t need to  know specific wavelength for each color)

∙ Define visible light.

∙ State the relationship between wavelength and energy.  

∙ State the range of wavelengths that fall within the visible spectrum.

2.9.S3: 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.

Energy Conversion in  Visible Spectrum

Chloroplasts

Pigments

Chromatography

Absorption Spectrum

Action Spectrum