html5-img
1 / 11

2.4 ENERGY FLOW IN ECOSYSTEMS

2.4 ENERGY FLOW IN ECOSYSTEMS. SNC 1D: SUSTAINABLE ECOSYSTEMS UNIT. Types of energy. Radiant energy = energy radiated from the Sun ; source of most energy needed by organisms to live. Light energy is visible radiant energy

bonner
Download Presentation

2.4 ENERGY FLOW IN ECOSYSTEMS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 2.4 ENERGY FLOW IN ECOSYSTEMS SNC 1D: SUSTAINABLE ECOSYSTEMS UNIT

  2. Types of energy • Radiant energy= energy radiated from the Sun; source of most energy needed by organisms to live. Light energy is visible radiant energy • What happens to radiant energy? 70% is absorbed by hydro- and lithosphere and converted to thermal energy; 30% is reflected back into space. • Thermal energy= form of energy transferred during heating or cooling.

  3. Chemical Energy • Chemical energy can be stored in cells and released when needed by organisms for processes such as growth and reproduction.

  4. Photosynthesis • What is photosynthesis? • Process by which Sun’s energy is converted into chemical energy by green pigment called chlorophyll • Organisms that use this process to make their own food are called producers (green plants, algae, cyanobacteria) • Word equation for photosynthesis: Light energy carbon dioxide + water  sugar + oxygen

  5. Photosynthesis Image

  6. What happens to sugar produced from photosynthesis? • Some is stored in roots, stems, leaves and seeds of plants as starch (storage compound) • Some used to build complex carbohydrates or proteins

  7. Discovery of photosynthesis: video clip • http://www.youtube.com/watch?v=pdgkuT12e14

  8. Cellular Respiration • Process by which sugar is converted into carbon dioxide, water and energy • Released energy is used to carry out cellular activities • Word equation for cellular respiration: sugar + oxygen  carbon dioxide + water + energy

  9. Relationship between cellular respiration and photosynthesis

  10. Difference between consumers and producers • Consumers cannot photosynthesize; therefore, they rely on producers to obtain energy. • Both producers and consumers can undergo cellular respiration.

  11. Overview video • http://www.youtube.com/watch?v=o_RBHfjZsUQ

More Related