Swinging Pendulum (for High School)
This activity shows students the engineering importance of understanding the laws of mechanical energy. More specifically, it demonstrates how potential energy can be converted to kinetic energy and back again. Given a pendulum height, students calculate and predict how fast the pendulum will swing by using the equations for potential and kinetic energy. The equations will be justified as students experimentally measure the speed of the pendulum and compare theory with reality.
Sliders (for High School)
In this hands-on activity, students learn about two types of friction static and kinetic and the equation that governs them. They also measure the coefficient of static friction and the coefficient of kinetic friction experimentally.
Students examine collisions between two skateboards with different masses to learn about conservation of momentum in collisions.
3.5.1 IPv4 Addresses The allocation of addresses on the Internet is controlled by the Internet Assigned Numbers Authority (IANA), although authority is delegated to several local registries. IPv4 addresses may be interpreted in two ways. Initially, they were divided into distinct ranges of addresses called classes, but this proved to be inflexible and now a more flexible scheme, called classless addressing, dominates IPv4 internetworks. I shall describe both ways of interpreting IPv4 addresses because the limitat
The allocation of addresses on the Internet is controlled by the Internet Assigned Numbers Authority (IANA), although authority is delegated to several local registries. IPv4 addresses may be interpreted in two ways. Initially, they were divided into distinct ranges of addresses called classes, but this proved to be inflexible and now a more flexible scheme, called classless addressing, dominates IPv4 internetworks. I shall describe both ways of interpreting IPv4 addresses because the limitat
6.3 Authentication of information
BBC News 24, Sky News, CNN – we live in an era where news has become almost instantaneous. This unit will look at how news is gathered and the technology used for its dissemination. You will also be encouraged to examine how information might be manipulated by questioning its reliability.
Lock and Key Hypothesis
Introducing the "lock and key" analogy of drug-receptor interaction, whereby only drugs of a certain molecular shape will 'fit' with a cell membrane receptor.
Live like an Animal
In this activity, students design an innovative human shelter that is inspired and informed by an animal structure. Each group is assigned an animal class, and they gather information about shelters used by the animals in that class. After researching the topic and brainstorming ideas, students build small prototypes (models) of the structures. Finally, they present their products, explaining what attribute of the animal structure influenced their design.
Burdock seeds are curved and there is a kind of hook on one end of the seed. The hook is easily caught on animal fur and the clothing of humans as they pass by. This helps the seeds spread. This is a commensalistic relationship because the burdock plant benefits while the animal or human is neither harmed nor helped.
Lesson plan with word search activity which aims to teach children about the metamorphosis and development of an amphibian from tadpole to frog.
How Lou Got the Flu
This article from our family magazine series traces the spread of the flu virus from a duck in China to a young girl in Kansas. The article begins by introducing kids to Louise and the symptoms of influenza. On a series of clickable screens, they learn how the flu virus traveled from a duck to a pig to a farmer to a shopper to a student to Louise. A sidebar (But I Got a Flu Shot Last Year...) explains why influenza is trickier to outsmart than smallpox and polio. Another sidebar ("Microbes on th
Meet the Microbes
This article from our family magazine series introduces kids to bacteria, viruses, and protozoa. The article begins with an engaging introduction to microbes that explains the abundance of this oldest form of life on Earth. Kids can click to see colorful photographs of bacteria, viruses, and protozoa, as well as details about these major types of microbes. The Microbe Size-O-Meter puts microbes into perspective, using a scale in which a kid's body is the size of California. A humorous sidebar ex
Baseball as America
This Web site, created to complement the Baseball as America exhibit, looks at how this sport has changed along with the country. It includes the following sections:Our National Spirit examines why the label "national pastime" has grown increasingly accurate over time. Ideals and Injustices considers the game's troubling legacy of segregation and why the sport is seen as "doorway to American culture" by many immigrants. Sharing a Common Culture looks at how the game and its heroes have become a
Epidemic! The World of Infectious Disease - Exhibit
This Web site, created to complement the museum's Epidemic! exhibit, provides an in-depth look at the world of infectious disease. It includes the following sections: Environmental Change looks at how a season of heavy snow and rainfall led to an outbreak of hantavirus in the Four Corners region of the southwestern U.S., and at the different habitat needs of microbes. Long-Term Changes examines how changes to the prehistoric landscape and in our living patterns since the development of agricultu
2.11 Further exercises
Number systems and the rules for combining numbers can be daunting. This unit will help you to understand the detail of rational and real numbers, complex numbers and integers. You will also be introduced to modular arithmetic and the concept of a relation between elements of a set.
4.1 Scientific approaches
Hibernation is an ingenious adaptation that some animals employ to survive difficult conditions in winter. This unit examines the differences between hibernation and torpor, and discusses the characteristic signs of hibernation behaviour. It explores the triggers that bring on hibernation, and whether internal signals or external season cues are predominant. It also examines the physiological adaptations that occur in hibernating animals. This unit builds on and develops ideas introduced in the
Progression of Hurricane Frances, 2004 (WMS)
Hurricane Frances was the second hurricane to hit Florida during the 2004 hurricane season. This set of images shows the progression of the hurricane as it approached Florida from the Atlantic Ocean.
Distinguished Innovator Lecture Series: Ann Winblad
Ann Winblad is the co-founding Partner of Hummer Winblad Venture Partners. She is a well-known and respected software industry entrepreneur and technology leader. Her background and experience have been chronicled in many national business and trade publications. Ann has over 25 years of experience in the software industry. She began her career as a systems programmer at the Federal Reserve Bank. In 1976 Ann co-founded Open Systems, Inc., a top selling accounting software company, with a $500 i
Shopping for Boxing Day!
Op het einde van deze les kun je: De teksten op producten begrijpen.
"Human Rights are Women's Rights and Workers' Rights are Women's Rights:" May Chen on the United Nat
The United Nations Fourth World Conference on Women was held in Beijing, China during September 1995. The conference, which called for gender equality, development, and peace, grew out of the international women's movement and marked the end of the official United Nations decade of Women. For women like May Chen, Vice President of the Union of Needletrades, Industrial, and Textile Employees (UNITE), the conference was an opportunity to share their activist experiences and learn about issues conf
Lateblight: A Plant Disease Management Simulation
Lateblight allows students * to manipulate the variables that affect the development of late blight * to adjust the economic parameters that determine the cost-effectiveness of the disease management procedures Students can also simulate the use of potato cultivars by altering: * the level of resistance to the fungus * the time of initiation of tuber production * the yield potential of the crop in the absence of disease