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There are 6 videos in this category and 3901 videos in 568 subcategories.
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Not Right For WatchKnowLearn
Ages: 9 - 18
2013 Views:
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Shows video of deep sea worms and a defensive mechanism that allows the worm to release bioluminescent tissue. Also discusses adaptation of rice to avoid drowning and host cell infections by bacteria. This video could be used on animal adaptations an...d defenses as well as plant adaptations.
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January 18, 2010 at 09:54 PM
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Not Right For WatchKnowLearn
Ages: 8 - 18
346 Views:
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Scientists estimate that there are currently 50,000 invasive plant and animal species in America - and that number's sure to rise. Mark Strassmann reports in this CBS news special. Some animals discussed are Asian Silver Carp, African Killer Honey B...ees, a South American Rodent, and the Burmese Python. One plant discussed includes Kudzu, also insects, mussels, and giant slugs. The video talks about the pros and cons of bringing animals and plants from other parts of the world into America, including the expensive monetary concerns involved with control of some invasive species. (9:46)
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November 12, 2012 at 02:59 PM
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Not Right For WatchKnowLearn
Ages: 8 - 18
1190 Views:
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Powers of Ten is an adventure in magnitudes. Starting at a picnic by the lakeside in Chicago, this famous film transports viewers to the outer edges of the universe. Every ten seconds we view the starting point from ten times farther out until our o...wn galaxy is visible only a s a speck of light among many others. Returning to Earth with breathtaking speed, we move inward- into the hand of the sleeping picnicker- with ten times more magnification every ten seconds. The journey ends inside a proton of a carbon atom within a DNA molecule in a white blood cell. (9:01)
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December 26, 2011 at 12:33 AM
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Not Right For WatchKnowLearn
Ages: 8 - 18
2687 Views:
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A video series that asks questions about what is life and provides some challenges to the existing knowledge base. Good for teachers and may be motivating to some students who would benefit from the overview.
Session 1. What
Is Life?
What disti...nguishes living things from dead and
nonliving things? No single characteristic is enough to define what is meant by “life.” In this session, five characteristics are introduced as unifying themes in the living world.
Session 2. Classifying Living Things
How can we make sense of the living world? During this
session, a systematic approach to biological classification is introduced as a starting point for understanding the nature of the remarkable diversity of life on Earth.
Session 3. Animal Life Cycles
One characteristic of all life forms is a life cycle—from
reproduction in one generation to reproduction in the next. This session introduces life cycles by focusing on continuity of life in the Animal Kingdom.
In addition to considering what aspects of life cycles can be observed directly, the underlying role of DNA as the hereditary material is explored.
Session 4. Plant Life Cycles
What is a plant? One distinguishing feature of members of the Plant
Kingdom is their life cycle. In this session, flowering plants serve as examples for studying the plant life cycle by considering the roles of seeds, flowers, and fruits. A comparison to animal life cycles reveals some surprising similarities and intriguing differences. Go to this unit.
Session 5. Variation, Adaptation, and Natural Selection
What causes variation among a population of
living things? How can variation in one generation influence the next
generation? In this session, variation in a population will be examined as the “raw material” upon which natural selection acts.
Session 6. Evolution and the Tree of Life
Why are there so many different kinds of living things?
Comparing species that exist today reveals a lot about their relationships to one another and provides evidence of common origins. This session explores the theory of evolution: change in species over time.
Session 7. Energy Flow in Communities
Communities are populations of organisms that live
and interact together. The structure of a community is defined by food web interactions. The process of energy flow is the focus of this session as the interactions between producers, consumers, and decomposers are examined..
Session 8. Material Cycles in Ecosystems
Studying an ecosystem involves looking at
interactions between living things as well as the nonliving environment that surrounds them. Life depends upon the nonliving world for habitat, as well as energy and materials. In this session, material cycles will be explored as critical processes that sustain life in an ecosystem.
This material is copyrighted and can only be viewed on the site.
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December 27, 2010 at 11:07 PM
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Not Right For WatchKnowLearn
Ages: 8 - 18
1106 Views:
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This 1:25 video does not have narration, but is a compilation of facts about humans and others that should be of value to all students. Moves rapidly and so teachers may have to stop the video to ask questions or add content.
January 10, 2012 at 09:27 PM
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Not Right For WatchKnowLearn
Ages: 6 - 18
984 Views:
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This 1:35 video explains that the oldest known animal was a 405-year-old clam found near Iceland, dredged up in 2007. But trees have lasted even longer, and the longest-living organism of all might is an ancient lichen from Greenland. A turtle is cur...rently the oldest animal. Students should like this video, but may need to understand more about the lifespans of others animals and how long a human generation is.
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January 11, 2012 at 08:56 PM
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