Making Nylon: It has now been 14 years since I was i

Making Nylon: It has now been 14 years since I was i
Sulfur hexafluoride: I require information on availability, safety, cost and suppliers of sulfur hexafluride.
This online resource is a source of science-related images.
Sharps container disposal: Hi. I just want to know where we should dispose our full sharps container.
Supply of large calcium carbonate marble chips: I have been asked to purchase large calcium carbonate marble chips, as the chem supply ones are the wrong size. any suggestions??
This YouTube video shows a household demonstration of the refraction of light.
This online resource looks at how to use scientific models effectively.
Plant ecology - oxygen-producing plants: What aquatic plants are legal to use for photosynthesis experiments in Australia, in particular Western Australia?
This unit of work explores water catchment, water distribution, and the uses of water.
This unit of work is an introduction to the concepts of light and sound.