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(S-1) Sunlight and the Earth
Students discuss the solar heating of the Earth and atmosphere, its heat loss proceses, and the way these relate to weather and climate.
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#24 Rotating Frames of Reference in Space and on Earth
Students explore rotating frames of reference, focusing on the weightless environment in space and the Coriolis force.
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#22c Airplane flight #22d Airplane flight--How High? How Fast?
Students discuss the application of frames of reference to an airplane flying with a constant velocity v through the air.
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Motion in a Circle
Students study about deriving centripetal acceleration for motion at constant speed around a circle.
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Precession
Students explain how Hipparchus, around 130 BC, used a shift in the predicted location of a lunar eclipse to detect a slight shift in the path of the Sun around the sky. They examine the elliptical orbit in which the Earth travels around...
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The Sundial
High schoolers explain the design, principle and orientation of a sundial, the type with a gnomon pointing towards the pole of the heavens. They construct a model sundial from paper.
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Stargazers And Skywatchers
Students recognize the daily motion of the Sun across the sky, defining the main directions of east, west, south and north. They see how the first calendars were based on changes in the Sun's noontime elevation, and on locations of...
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Stargazers and Skywatchers
Students are introduced to the apparent motion of the Sun across the sky and the way it changes in summer and winter.
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The Path of the Sun, the Ecliptic
Students are introduced to the ecliptic, the zodiac and the apparent motions of the Sun, Moon and planets across the sky.
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Stargazers and Skywatchers
Students observe the daily motions of the sun and relate them to the functions of a sundial. They determine the locations of sunrises and sunsets and determine how the elevation of the sun effects temperature.
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The Path of the Sun: The Ecliptic
Students investigate the celestial sphere and the paths it takes in the solar system.
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Finding the Pole Star
Students study the constellations fo the Big Dipper and Cassiopeia and their use in finding the Pole Star. They realize that other celestial objects--Sun, Moon and planets--share the rotation (and hence rise and set), even though their...
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The Angle of the Sun's Rays
Young scholars study elevation of the Sun above the horizon and the angle of the rays and their heating power.
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Accelerated Frames of Reference: Inertial Forces
Students examine how when applying the laws of motion to an object in an accelerating frame, using coordinates defined in such frame, one must always add an "inertial force", representing forces caused by the frame's acceleration.
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Clean Air
Students observe gas molecules in the atmosphere absorbing the light that goes through them.
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Water in the Air
Students simulate how clouds block radition and how water in the air condense around containers.
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Particulate Sampler
Students estimate the extent of particulate air pollution present in their neighborhoods.
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Heat Currents
Students using a slide made out of aluminum foil and pin holes observe visible light.
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Simple Spectroscope
Students make a spectroscope out of simple materials and are expected to view as many different light sources as possible to see the whole spectrum.
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Projecting Spectra
Students use two methods to show and study the colors in the visible spectrum.
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Analytical Spectroscope
Students using a spectroscope view different substances when heated with electricity.
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Water Prism
Students using a glass prism filled with water are able to see all of the visible colors found the sunlight.
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Wavelength and Energy
Pupils using a rope and other materials explore wavelengths and frequency. If time permits, more experiments can be tried.
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