What Floats Your Boat?
Students use modeling clay, a material that is denser than water and thus ordinarily sinks in water, to discover the principle of buoyancy. They begin by designing and building boats out of clay that will float in water, and then refine their designs so that their boats will carry as great a load (metal washers) as possible. Building a clay boat to hold as much weight as possible is an engineering design problem. Next, they compare amount of water displaced by a lump of clay that sinks to the am
The Earth is a Changin’
This lesson introduces and describes the main types of erosion (i.e., chemical, water, wind, glacier and temperature). Students learn examples of each type of erosion and discuss how erosion changes the surface of the Earth. Students also learn why engineers need to be aware of the different types of erosion in order to protect structures and landmarks from the damaging effects erosion can cause. Figure 1 is an excellent illustration of water erosion.
Yeast Cells Respire, Too (But Not Like Me and You)
Students set up a simple way to indirectly observe and quantify the amount of respiration occurring in yeast-molasses cultures. Each student adds a small amount of baking yeast to a test tube filled with diluted molasses. A second, smaller test tube is then placed upside-down inside the solution. As the yeast cells respire, the carbon dioxide they produce is trapped inside the inverted test tube, producing a growing bubble of gas that is easily observed and measured. Students are presented with
Heat It Up!
Through a teacher demonstration using water, heat and food coloring, students see how convection moves the energy of the Sun from its core outwards. Students learn about the three different modes of heat transfer (convection, conduction, radiation) and how they are related to the Sun and life on our planet.
The purpose of this activity is to recreate the classic egg-drop experiment with an analogy to the Mars rover landing. The concept of terminal velocity will be introduced, and students will perform several velocity calculations. Also, students will have to design and build their lander within a pre-determined budget to help reinforce a real-world design scenario.
Students are challenged to design and build wind chimes using their knowledge of physics and sound waves, and under given constraints such as weight, cost and number of musical notes it must generate. They make mathematical computations to determine the pipe lengths.
Convertible Shoes: Function, Fashion and Design
Students teams design and build shoe prototypes that convert between high heels and athletic shoes. They apply their knowledge about the mechanics of walking and running as well as shoe design (as learned in the associated lesson) to design a multifunctional shoe that is both fashionable and functional.
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.
Two Sides of One Force
Students learn more about magnetism, and how magnetism and electricity are related in electromagnets. They learn the fundamentals about how simple electric motors and electromagnets work. Students also learn about hybrid gasoline-electric cars and their advantages over conventional gasoline-only-powered cars.
The Rise and Fall of the Sacred Rulers of the Maya World
Justin Jennings is Associate Curator of New World Archaeology at the ROM and lead curator of the exhibition Maya: Secrets of their Ancient World.
What Not to Believe About the Ancient Maya
Elizabeth Graham is a Professor at the Institute of Archaeology, University College London, and an Adjunct Research Professor in Anthology at the University of Western Ontario.
History Wars: Tommy Douglas Put Canada's Healthcare on the Wrong Path
Did Tommy Douglas put Canada's Healthcare on the wrong path? Canadian historian and award-winning author Michael Bliss and Greg Marchildon, CEO of the Romanow Royal Commission on Health Care, take the gloves off.
The autistic spectrum: from theory to practice
Most of us have a very vague and narrow concept of what autism is, based mainly on such stereotypes as Dustin Hoffman's character in the film Rain Man. In this unit you will discover that there is a wide spectrum of disorders associated with autism, and an equally wide range of approaches to diagnosis and treatment.
Normal - Mental Status Exam - Frontal Lobe/Executive Sub-exam - Patient 1
Patient is a female with no known neurological health problems who volunteered to act as a simulated patient in order to demonstrate 'normal' responses to exam techniques. She is merely a reference point for exam procedures and protocols, as well as to denote subtle signs from diagnosed patients.
Eddie and the Hagfish
Hagfish are amazing ocean fishes! They are found nearly worldwide mostly in deeper ocean environments, and are some of the most primitive fishes in existence...
Interactive Panel: The Importance of Being Native In 2011, we saw a resurgence of interest in native code - in C++ in 2011 and in C++11. Is this "C++ Renaissance" a flash in the pan? Is it a long-term trend?
This is an interactive panel. This means you, the attendee in the room or online, will be first class members of the conversation - you drive it. You ask the questions. The theme has been provided. Where do you want to take it? It's up to you.
In 2011, we saw a resurgence of interest in native code - in C++ in 2011 and in C++11. Is this "C++ Renaissance" a flash in the pan? Is it a long-term trend?
Breathing Life into History
Rosemary Wells compares and contracts historical fiction with non-fiction, and explains how good historical fiction gets the facts right, but also gives the reader a colorful hero or heroine, someone to walk through history with.
Lunch Poems - giovanni singleton
http://lunchpoems.berkeley.edu/ This reading celebrates the publication of ascension (Counterpath Press), the first book of poems by giovanni singleton, coordinator of Lunch Poems. She has recently been selected by the Poetry Society of America for its biennial New American Poets series. singleton is a recipient of a New Langton Bay Area Award Show for Literature and has been a fellow at Squaw Valley Community of Writers, Cave Canem: A Workshop for African-American Poets, and the Napa Valley Wri
Science Bulletins: Tapping In—The Promise of Brain-Computer Interface
For decades, neuroscientists have sought to use electronics to communicate with the brain. Computing and surgical technique have now become sophisticated enough to implant devices directly into neural tissue. In this feature, researchers at Albany Medical Center and the Wadsworth Center at the New York State Department of Health reveal a world where mind and machine merge. Their cutting-edge devices translate brain signals into action, helping people with ALS and other disabilities regain the ab