Learn Biology: Ecosystem Definition & Abiotic vs. Biotic Factors
Videos - Interactions within Ecosystems
Abiotic and Biotic Factors
Abiotic and Biotic Factors
Defines and shows examples of the abiotic and biotic factors within ecosystems.
Ecosystems
A song to help you learn more definitions related to ecosystems
Abiotic Biotic
A song to help you learn the definitions of abiotic and biotic
Basics of Symbiosis
Definitions and examples of symbiosis and the 3 main types: parasitism, mutualism, and commensalism.
Food Chains
A video describing food chains and webs and pretty much everything you need to know about them.
FYI: troph =something to do with food ("troph" is a suffix meaning food or feeding - "trophic level" is a level of a food chain; "autotroph" is an organism that makes its own food; "heterotroph" is an organism that needs to eat other organisms)
The 10 Percent Rule
A video about energy transfer through a food web and how only 10% of the energy in one level makes it to the next level.
How Ecosystems Work: Energy Flow and Nutrient Cycles
A great video about energy transfer and nutrient cycles.
Nutrient Cycling
Simple explanation of nutrient cycling.
Crash Course Ecology: Nitrogen and Phosphorous Cycles
Much more information than you need, but Hank Green does an awesome job of explaining it.
Jae Rhim Lee: My Mushroom Burial Suit
This goes beyond what you need to know in Grade 7 Science. It is, however, an extension of our learning about the nutrient cycle. She is experimenting with cultivating mushrooms to clean the toxins from her body and decompose her body after she dies so that her body will decompose faster and have less of a negative impact on the environment. She has some very interesting ideas!
Succession
A good explanation of primary and secondary succession.
Ecological Succession of the Climax Forest
A little slow, but does the trick. It describes Primary Succession in good detail. It introduces secondary succession, but after a fire, we don't start with rock. Some of the soil and seeds survive.
Crash Course Ecology: Ecological Succession
Lots of words. You don't need to know all of them. But the explanation is terrific.
Crash Course Ecology: 5 Human Impacts on the Environment
Crash Course Ecology: Pollution
Crash Course Ecology: Conservation & Restoration
Turn Back the Tide
Wow! We were just talking about this! Check out this video about climate change and what we can do to slow it down and protect our planet. Then visit the website - turnbackthetide.ca.
An Inconvenient Truth (preview)
A preview of Al Gore's documentary about global warming and how humans are affecting the Earth.
Al Gore: Alarming new slides of the worsening climate crisis
Al Gore updates some of his information from "An Inconvenient Truth"
Al Gore: Averting the climate crisis
Al Gore spells out 15 ways that individuals can address climate change immediately, from buying a hybrid to inventing a new, hotter "brand name" for global warming. His target audience is highly educated adults, so some of it might be over your heads. He starts listing the 15 ways at about 9:15. Some of the items on his list are specific to adults. How can you as young people reduce your impact on the environment?
Our Ecosystem Exploration
