Stripped-down Motor
In this activity, you'll make an electric motor--a simple version of the electric motors found in toys, tools, and appliances everywhere. The activity includes three short online videos: Introduction, Step-by-Step Instructions, and What's Going On. Also available: a concept map and a "Going Further" document that suggests variations on this activity.
Jitterbug
This activity explores the concept of center of gravity by having learners build a Jitterbug--a motorized toy that seems to dance--using a recycled CD and a DC motor. The activity includes three short online videos: Introduction, Step-by-Step Instructions, and What's Going On. Also available: a concept map and a "Going Further" document that suggests variations on this activity.
How To Build a Spectroscope
In this activity, learners use simple materials and diffraction grating to construct a spectroscope. The spectroscope allows learners to see and compare the spectra produced by different light sources. This resource includes audio clips from Marco and Vivian, who explain how to build the spectroscope and information about how it works. Adult assistance recommended.
Fantastic Four
This is a game that is sure to sharpen players' basic math skills. Players must use four randomly selected numbers to create an equation that equals a fifth number. The game gives learners a chance to practice different mathematical operations and to practice writing equations correctly. Fantastic Four is easily adapted for different skill levels.
embARC Summer Design Academy for High School Students - College of Environmental Design, UC Berkeley
embARC brings together students from diverse backgrounds to CED to study architecture, urban design and sustainable city planning through a series of lectures, fieldtrips and design studios. Students who fulfill the course requirements will receive a letter grade for a 1-unit course. Commuter and residential options are available.
Visit our website: www.ced.berkeley.edu/college/academics/embarc
Inoefening rekentoets : Sprong 4 Alle oefeningen van de sprong 4 zijn verwerkt in dit huiswerkblad om thuis te maken voor Rekensprong 4 van het vierde leerjaar.
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Market Pulse: Calma! Italian slide is merely profit-taking
Dec. 10 - The sharp selloff in Italian assets after PM Monti said he will resign is just a bout of overdue profit-taking. 10-yr yields could go to 5.25%, but don't panic, says IDEAglobal's Michael Gallagher.
NASA: Piecing Together the Temperature Puzzle The earth is running a fever and scientists predict it is going to get much worse. Data from NASA satellites can be used to monitor climate change and study the possible causes.
Aurora Northern Lights as seen from Space - Timelapse A video of Northern Lights as seen from earth's orbit, captured by Astronaut Don Pettit.
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2.3 Analysing nucleic acid structures In studying nucleic acid structures, many different experimental approaches can be adopted. In many cases, nucleic acid structures are examined in vitro, under non-physiological conditions, such as after denaturation or chemical synthesis. Nucleic acids within a cell are formed under very specific conditions and the structures that they adopt are influenced not only by the nature of their synthesis (by DNA or RNA polymerases), but by ancillary proteins that influence their folding. Nev
Acknowledgements Grateful acknowledgement is made to the following sources for permission to reproduce material in this unit: The content acknowledged below is Proprietary and used under licence (not subject to Creative Commons licence). See Terms and Conditions. Figure 4 BP (2
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3.8 Review In this unit we have looked at some of the factors which infuence a couple's decision to have a child. For people who choose not to do so, at least for some part of their lives, a range of contraceptive practices is available. We have looked at the biological processes involved in producing gametes, and at the precise sequence of events necessary to produce a healthy, fertilized egg. We have seen how this egg develops, first as a pre-programmed, free-living embryo, then becomes buried within
1.5.3 A note on functions and derivatives This subsection introduces two crucially important mathematical ideas, functions and derivatives, both of which are used throughout physics.
4.5 Endocrine disruptors Then he was a she… (Lou Reed, American rock singer) In 1996, a book called Our Stolen Future was published, bringing to public attention a debate that had been simmering among biologists for some time. Written by Theo Colborn and two colleagues at the World Wildlife Fund (WWF), this book presented the hypothesis that certain industrial chemicals, commonly found as environmental pol
6.3 Chemical formulas By using symbols, elements can be represented much more conveniently and much more briefly. This method of using symbols can be extended to compounds. You will now look further into this idea using a very familiar compound: water. Recall which atoms there are in a water molecule. 1.7 Summary of Section 1 and questions Converging lenses or mirrors cause parallel beams of light to be brought to a focus at the focal point, situated at a distance of one focal length beyond the lens or one focal length in front of the mirror. Diverging lenses or mirrors cause parallel beams of light to diverge as if emanating from the focal point of the lens or mirror. Light paths are reversible, so a converging lens or mirror may also act as a collimator and
Question 24
