1 / 8

http://www.gould.edu.au/foodwebs/africa.htm

http://www.gould.edu.au/foodwebs/africa.htm http ://www.mcgrawhill.ca/school/learningcentres/mod/quiz/attempt.php?id=19751. Science 7-Topic 5: Cycles in the Environment. The Cycle of Life. When organisms breathe, the gases are recycled in the air and used by other organisms.

limei
Télécharger la présentation

http://www.gould.edu.au/foodwebs/africa.htm

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. http://www.gould.edu.au/foodwebs/africa.htm • http://www.mcgrawhill.ca/school/learningcentres/mod/quiz/attempt.php?id=19751

  2. Science 7-Topic 5: Cycles in the Environment

  3. The Cycle of Life • When organisms breathe, the gases are recycled in the air and used by other organisms. • When organisms die, the nutrients they are composed of are recycled back into the environment and used as well. • http://www.youtube.com/watch?v=HwSKkKrUzUk

  4. The Carbon Cycle • Carbon is necessary for all life to exist and is recycled in the environment. • http://www.brainpop.com/science/earthsystem/carboncycle/preview.weml • http://www.youtube.com/watch?v=HrIr3xDhQ0E&feature=related

  5. The Water Cycle • All living things require water to survive and this water is also recycled over and over again.  • The water cycle contains 4 processes: • evaporation and transpiration • move water from the Earth to the atmosphere,  • condensation and precipitation • return the water to Earth. • http://www.brainpop.com/science/earthsystem/watercycle/preview.weml • http://www.epa.gov/ogwdw/kids/flash/flash_watercycle.html

  6. Pollution in the Environment • Pollutionoccurs when a substance is added to the environment at such a fast rate that it cannot be broken down, stored or recycled in the air, land, or water in a non-damaging form.  • Pollutants are substances that cause pollution.

  7. Bioaccumulation is the process in which a substance builds up in a living organism from the surrounding air or water, or through the consumption of organisms that already have the substance that is being accumulated. • It will vary for different species and will depend on sources of contamination, as well as water quality and temperature.

  8. It provides increasing levels harmful to species higher up the food chain, because of "biomagnification", where substances like mercury will increase in concentration from microorganisms, to fish, to fish eating predators like otters and loons, and to humans • http://techalive.mtu.edu/meec/module02/BioconcentrationandBioaccumulation.htm • http://www.youtube.com/watch?v=QTqd-7cQiAI

More Related