Floods: The Awesome Power
A newly released publication from the National Oceanic and Atmospheric Administration, the National Weather Service, and the Red Cross is entitled "Floods: The Awesome Power." The citizen-focused sixteen-page preparedness guide explains "flood-related hazards and suggests life-saving actions you can take." Readers will learn what flash floods are, what to do if youre caught in your vehicle during a flash flood, what river floods are, how tropical cyclones create floods, where to get current we
Computer Architecture Tutorial
Students in computer science or engineering will find this tutorial on computer architecture very useful and enlightening. Contributed by Professor Prabhu at Iowa State University, the material covers beginning and intermediate topics. Beginning with an overview of basic theorems, like Amdahl's Law, Prabhu explains the most important considerations for processor performance. He then goes into more details of a computer's operation, with a particular emphasis on memory hierarchy. This constitutes
Predicting Invasions of Nonindigenous Plants and Plant Pests
This Web site contains the free book Predicting Invasions of Nonindigenous Plants and Plant Pests provided by the National Academies Press. Compiled by the US Board on Life Sciences and the Board on Agriculture and Natural Resources, this 194-page book explores the difficulties in predicting the immigration and impact of exotic species. Researchers active in this field may find this free resource of use.
Energy : An Introduction
This article presents an introduction to the forms and changes in energy. This lesson discusses potential and kinetic energy as well as introducing the 1st and 2nd law of thermodynamics.
Students solve and reduce fractional equations by playing Soccer Shootout. Levels of difficulty range from Easy to Super Brain and users can practice the addition, subtraction, multiplication, and division of fractions. Fractions with like and unlike denominators are included. Students play against the computer and are provided with the correct answer when a wrong one is entered.
Trees, soil and water : Journey to Forever
Trees, soil and water: Journey to Forever - healthcare for mountains, trees for deserts, trees for people, forest, forestry, deforestation, erosion, soil conservation, water conservation, desertification This article discusses the interdependence between trees, soil, and water from a biological and conservationist standpoint.
This online exhibit on Leonardo da Vinci includes references and activities about both his scientific and artistic work. The site is divided into several sections, with each section offering background information about da Vinci, links to more in depth articles and classroom activities.
The Metric System : Metric and Scientific Notation
This lesson describes the history and basic operation of the metric system as well as scientific notation. Metric to English conversions and examples of unit conversions by moving the decimal are included.
Who done It? Or what's that brown fuzzy stuff on my plum?
A safe and simple exercise that uses Koch's postulates to prove that an observed fungus is the cause of fruit disease. Since the fungus that causes brown rot of stone fruit is present naturally on the surface of these fruit, stone fruit purchased from the supermarket or farm stand will usually develop the disease. The fungi responsible for brown rot of stone fruit are not human pathogens. This lab requires dissecting and compound microscopes. A simplified exercise, without cultures, to demonstra
This is a simple activity to visualize a communication system. In order to do this the students encode, decode, transmit, receive and store messages. They will use a code sheet and flashlight for this process. They will also maintain a storage sheet from which they can retrieve information as and when it is required.
Ernest Rutherford : Nobel Prize in Chemistry 1908
This biography was first published in the book series Les Prix Nobel. It was later edited and republished in Nobel Lectures, Chemistry 1901-1921, Elsevier Publishing Company, Amsterdam, 1966. A photo is included.
This site provides a comprehensive introduction to tessellations. It explains the basic mathematics underlying tessellations and gives examples of tessellations in real life. Site also provides information on M.C. Escher's tessellations.
Observe an animation of a thunderstorm
These animated satellite images allow Earth science students to follow the formation of a thunderstorm over central Florida. The introduction explains how thunderstorms are formed by the updrafts of warm, moist air. Students are instructed to observe the animation to see the formation of cumulonimbus clouds and to observe the effect of downdrafts on the storms. The animation is linked to a map of the United States that shows the storm's location. Movie controls allow students to repeat, pause, o
Ancient Chinese mathematics
This website contains a timeline and examples of early Chinese mathematics. Included are the Chinese version of the Pythagorean Theorem, a method of solving a system of linear equations, Pascals triangle, permutations and combinations, rule of false position, rule of three, magic squares, and puzzles. Other terms: fractions, algebra, negative numbers, scholars. (Includes 11 references)
1 A New View of Society
Childcare, education, working conditions, healthcare, crime … these issues are hotly debated in today's society. They are also issues that Robert Owen, seen by some as a visionary and by others as a knave and a charlatan, sought to address in the early 1800s. This unit uses a series of essays written by Owen to explore the ideas of this important and controversial figure.
Pointing at Maximum Power for PV
Student teams measure voltage and current in order to determine the power output of a photovoltaic (PV) panel. They vary the resistance in a simple circuit connected to the panel to demonstrate the effects on voltage, current, and power output. After collecting data, they calculate power for each resistance setting, creating a graph of current vs. voltage, and indentifying the maximum power point.
In this activity, students examine various materials and investigate how they interact with light. Students use five new vocabulary words (translucent, transparent, opaque, reflection and refraction) to describe how light interacts with the objects.
Get Your Motor Running
Students investigate motors and electromagnets as they construct their own simple electric motors using batteries, magnets, paper clips and wire.
Glue Sticks Bend & Twist
Students use hot glue gun sticks to learn about the forces of tension, compression and torsion.
An Arm and a Leg
As an introduction to bioengineering, students design and build a prototype of an artificial limb using a simple syringe system. Students determine which substance, water (liquid) or air (gas), makes the appendage more efficient.