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 Lesson Plans (2) Multimedia (3)

## ALEX Lesson Plans

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Subject: Mathematics (K - 4), or Credit Recovery Science (4), or Science (1)
Description: Students will identify objects as translucent, transparent, or opaque. Upon seeing the shadow of the opaque object, students will identify the geometric figure created by the shadow.This lesson plan was created as a result of the Girls Engaged in Math and Science University, GEMS-U Project.

## Thinkfinity Lesson Plans

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Subject: Science
Title: Magnify It!
Description: In this Science NetLinks lesson, students view objects of various sizes from several viewing distances to discover that their visual field is limited. Students record what they see and compare their observations with classmates in an open, nonjudgmental forum. They have the opportunity to speculate about and experiment freely with magnifying glasses and also conduct more structured experiments.

## ALEX Multimedia

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Transparent.Translucent, and Opaque Objects
Overview:
Students in Ms. Wyatt's Class at Eden Elementary School went on a hunt to find objects that are transparent, translucent, and opaque. This video defines the terms transparent, translucent, and opaque. The video also shows pictures of objects that fit each term.

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Einstein Demonstrations- Light Defraction
Overview:
This demonstration exhibits light’s wave-like characteristics. This is half of light’s duality; the other half being light’s particle-like characteristics. Using diffraction gratings we can compare the visible parts of atomic spectra for different elements. A diffraction grating consists of a large number of equally spaced parallel slits. These slits bend light differently according to wavelength. Incandescent lights work by heating a solid piece of tungsten wire. This heating of a solid produces a variety of wavelengths, giving an impressive spread of colors when viewed with a diffraction grating. Since the other lamps are single gaseous elements, they emit only a few wavelengths of light, their individual atomic spectra.

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Einstein Demonstrations- Photo-Electric Effect
Overview:
The message is the dual nature of light. When a gaseous element is raised to a high temperature, the atoms emit radiation having discreet wavelengths. The set of wavelengths for a given element is called its atomic spectrum. Einstein showed us that light can be described not only as a wave, like a water wave, but also as a particle. This understanding of light allowed us to understand why different elements have different fingerprint patterns of light known as spectra.