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Roland Gesthuizen

Mechanical Advantage - Pulleys - YouTube - 1 views

www.youtube.com/watch

science physcis YouTube demonstration pulley forces

shared by Roland Gesthuizen on 02 Aug 12 - No Cached
  • Roland Gesthuizen on 02 Aug 12
     
    "This video uses working simple machines to demonstrate how to calculate mechanical advantage. Suitable for any school program involving simple machines. Demonstrates pulley systems including a chain block."
Roland Gesthuizen

Pulleys - simple machines - YouTube - 1 views

www.youtube.com/watch

science physcis YouTube demonstration pulley forces

shared by Roland Gesthuizen on 02 Aug 12 - No Cached
  • Roland Gesthuizen on 02 Aug 12
     
    "Simple Machines lesson for 3rd grade unit. From Disney's Bill Nye the Science Guy. Levers, pulleys, and wheels. Also clips from Eureka!, a 1980 animated short series from Toronto. Music by John Williams"
Roland Gesthuizen

California Academy of Sciences: How Science Works - 2 views

video.calacademy.org/530

scientificmethod California science scienceteaching video

shared by Roland Gesthuizen on 18 May 14 - No Cached
  • Roland Gesthuizen on 18 May 14
     
    "How does science work? Kind of like a pinball machine. Check it out! The Academy's Charles Griswold takes us through the process of science with an exciting new spider discovery."
Sandra Goodrich

Postmodern Beatnik · Why sit in a tree? - 2 views

www.erickuhner.com/...why-sit-in-a-tree

environment environmental_science

shared by Sandra Goodrich on 31 Aug 14 - No Cached
  • private property rights and the pursuit of profit do not trump the needs of our communities and our planet.
  • the earth is alive and we are all interconnected, to nature and to each other. When we live from this new/old story, the world looks very different—and we can no longer accept business as usual.
  • in order to change this business as usual, we’ve got to change the story we have about who we are and how the world works. We act as though the earth were a dead ball of matter spinning through the cosmos and running like a machine and as though human beings were truly autonomous actors independent not only of the environment but of each other.
  • ...3 more annotations...
  • property rights are attenuated by the concept of stewardship, which requires property owners to maintain the ecological integrity of their land for the benefit of all.
  • bring attention to this larger picture.
  • bullying in public life has become all too common.
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