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Photosynthesis All cells need ___________ to carry out their functions, such as making proteins and __________________________ into and out of the cell Plants and other organisms such as ____________________and some bacteria, use _________________________ to make their own food Photosynthesis – the _____________________by which a cell captures ______________________ in sunlight and uses it to make food Nearly all living things obtain energy either __________________ or __________________ from the energy of sunlight captured during ______________________. Grass obtains energy directly from the _______________ because it makes its own food through ____________________. Then the zebra eats the grass; it gets energy that has been ______________ in the grass. Lastly, the lion gets _______________that has been stored in the _________________ – the zebra and lion obtain the sun’s energy indirectly An organism that can _________ food is called an ________________ and an organism that __________________manufacture its own food is called a heterotroph The_________ Stages of _____________! During photosynthesis, plants and some other organisms use energy from the sun to convert carbon dioxide and water into oxygen and sugars Photo means light, if you take a photograph you need to have light or the photo is dark. Stage 1: Capturing the Sun’s Energy This process occurs mostly in the _______ – the green color comes from the________, which are colored chemical compounds that absorb light (________ are the ______ organelle inside plant cells) o The main photosynthetic pigment in chloroplasts is __________________________! Stage 2: Using Energy to Make Food Next, the cell uses the ______________________energy to produce _______________ - the cell needs two raw materials for this stage – Water (H2O) & Carbon Dioxide (CO2) 1. The root ___________water from the soil 2. Then the water __________ through the plant’s stem to the leaves 3. Carbon Dioxide enters the plant through the small _____________ on the _______________ of the leaves called the ____________. 4. Once in the leaves, the water and carbon ____________ move into the ___________________ Inside the ______________, the H2O and CO2 undergo a complex series of ________________ reactions – the reactions are powered by the energy captured in the first stage!! Oxygen (O2) and _________-carbon sugars (C6H12O6) are produced! Almost ALL of the ______________________ in the Earth’s air was produced by ___________________________ things through the process of _____________________! Photosynthesis Equation: 6 CO2 + 6 Carbon Dioxide Light Energy 6 H2O - - - - - - - -> C6H12O6 6Water 1 Sugar Which two are the reactants? Which two are the products? + 6 O2 6 Oxygen