Photosynthesis. Energy Autotrophs Use energy from sun to make their own food Heterotrophs Cannot make their own food, so they eat autotrophs or other.

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Presentation transcript:

Photosynthesis

Energy Autotrophs Use energy from sun to make their own food Heterotrophs Cannot make their own food, so they eat autotrophs or other heterotrophs for food.

What is photosynthesis? Plants take energy from the sun and store it as sugars

Equation for Photosynthesis + light energy

Light & Pigments Visible Spectrum White light can be broken down into colors Pigments Absorb certain colors of light Reflect colors not absorbed

Chloroplast Pigments Chlorophyll Located in the THYLAKOID Absorbs red and blue light and reflects green Carotenoids Accessory pigment for colors yellow, orange, & brown

Parts of Photosynthesis Light Reactions Require light THYLAKOID Occur in the THYLAKOID Dark Reactions Does not require light STROMA Occurs in the STROMA

Light Reactions SunlightWater ATP NADPH Sunlight and Water are used to make ATP and NADPH Sun excites electrons and they go to a higher energy level OXYGEN (O 2 ) OXYGEN (O 2 ) is released This provides fuel for the dark reactions

Dark Reactions…the Calvin Cycle CO 2 ATP NADPH PGAL Uses CO 2, ATP, and NADPH to make PGAL PGAL is a building block to make glucose Carbohydrate sugar