2 All living things need or use energy. All organisms need or use energy in order to survive, it is one of the six characteristics of all living things.Animals get their energy from _________?plants and other animalsPlants get their energy from _________?the sun
3 Two different types of organisms Autotrophs/producers- are organisms that can make their own food. What are two examples of organisms that can make their own food?Heterotrophs/consumers- are organisms that can NOT make their own food. Heterotrophs get their ENERGY by consuming (eating) other organisms. What are two examples of a heterotroph?
4 Autotroph = ProducerPlants are autotrophs - they make their own food with the help of the sun. They do this through a process known as PHOTOSYNTHESIS.Algae and some bacteria are also autotrophs.Photosynthesis is the process by which a plant cell captures the sun’s energy and converts it to chemical energy.
5 Stages of Photosynthesis There are two stages of photosynthesis, they are:Stage one- capturing the sun’s energy in chlorplastsStage two- converting that energy into chemical (usable) energy
6 Stage one: capturing energy Chloroplasts in plant cells capture energy from sunlight.
7 ChloroplastsChloroplasts are in the cytoplasm of plant cells. They are flat, Frisbee-shaped structures filled with thylakoids.Thylakoids are small disk-like compartments made of membranes that are the site of photosynthesis.
9 Chloroplasts The thylakoids are surrounded by the stroma. Stroma are the inner liquid portion of the chloroplast.Thylakoids are often stacked on top of each other - they look like a stack of flapjacks.Source:
10 Stage two: Converting energy into chemical (usable) energy The captured light energy is used to produce sugars and oxygen from the water and carbon dioxide a plant takes in.
14 Photosynthesis Equation 6 CO H2O C₆H₁₂O₆ O2energy from sunCarbon dioxide + water sugar (fuel) + oxygenRaw Materials/Reactants (what is needed): Carbon Dioxide (CO2) and Water (H2O)Products (what is created/produced): Sugar (C₆H₁₂O₆) and Oxygen (O2)Another name for sugar is glucose.
15 Photosynthesis Raw Materials/Reactants What are the raw materials?Carbon dioxide and waterWhere does the CO2 come from?Animals exhale then goes through stomataWhere does the water come from?Absorbed through plants roots
16 Photosynthesis Products What are the products?Oxygen and glucose (sugar)Where does the oxygen go?Air for animalsWhere does the glucose (sugar) go?Food source for plants and animals