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Toxicity indicates how poisonous a substance is to biological organisms. To measure a chemical’s short-term toxicity, scientists carry out something called a “dose/response” study. The word dose refers to the total…
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Introduction to Watershed Dynamics
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The title of this book, Watershed Dynamics, refers to the idea that streams, rivers, lakes, and other water bodies are dynamic systems, continuously changing in many ways—physically, chemically, and biologically. Have…
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Imagine metal eyeglass frames that you can roll in a ball, only to watch it uncoil back to its original shape! How can an inanimate object, such as metal, do such a thing? There is a metal alloy that can do just that…
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Socks that don’t stink, graffiti-resistant paint, windows and sunscreen that reject UV rays… that’s nanotechnology. Students will learn about some of the latest inventions using nanotechnology by exploring actual…
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Nanotechnology has opened the door for medical applications that work at the molecular level to diagnose, treat, and prevent disease. This investigation models one approach to treating cancer that uses gold nanoshells…
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Building Small: Nano Inventions
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Just as cells were discovered with early light microscopes and Saturn’s rings by the first telescopes, the nanoscale world has emerged due to new tools such as the Atomic Force Microscope (AFM). As a result of being…
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Too Little Privacy: Ethics of Nanotechnology
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Advances in nanotechnology allow us to create unique and tiny labels for manufactured materials, create tiny sensors that can detect the presence of specific molecules, and make machines that are so small they can work…
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Just how big is a billion? How tiny is a nanometer? Five hands-on inquiry activities are presented that use measurement and calculations to help students visualize one billion. Students develop mental anchors or…
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Promise or Peril: Nanotechnology and the Environment
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Nanoscience research has made great strides in recent years in areas such as nanomaterials and drug delivery. This success has kindled hope for exciting technological breakthroughs in the near future in areas ranging…
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How do you get students to understand a number as small as one-billionth? Through a hands-on dilution activity using food coloring, students will learn about parts per billion. A matching card game helps students…
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Advances in nanotechnology are due in part to the unique structure and properties of carbon nanotubes and buckyballs. These unusual structures are being studied for their potential use as vehicles for drug delivery, to…
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Biological Nanomachines: Viruses
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Although nanotechnology is a new and emerging field, nanoscale structures are not new. Small molecules such as water, large molecules such as proteins, and larger, more complex objects such as viruses and nanotubes are…
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What’s In Your Bag? Investigating the Unknown
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In nanoscience, like all scientific endeavors, asking the right questions is a vital part of progress. Our ability to observe how things work at the nanoscale is very limited. We need the use of very advanced microscope…
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Nanomagnets: Fun with Ferrofluid
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Ferrofluid provides an easy opportunity to introduce students to the fascinating properties of the nanoscale. It is essentially a liquid magnet made of nanosized magnetic particles suspended in water or oil. Not only…
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Imagine you could build an object that is a billion times smaller than a meter. What would you build? An entire new field has emerged as a result of a new generation of microscopes that allows scientists to investigate…
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