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    Twin Cities Public Television
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    This activity (on page 2 of the PDF under SciGirls Activity: Forensics) is a full inquiry investigation into how hairs from a crime scene are matched to suspects. Learners each take a single hair...

    Over $20 per group Ages 8 - 14 1 to 2 hours
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    The Exploratorium
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    In this activity, learners use a laser pointer and two small rotating mirrors to create a variety of fascinating patterns, which can be easily and dramatically projected on a wall or screen. In...

    Over $20 per group Ages 11 - 18 1 to 2 hours
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    American Physical Society
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    Learners shine the light of a laser pointer through sheets of fabric that all have a different number of threads per inch. By looking at the patterns created, learners calculate the wavelength of...

    $5 - $10 per group Ages 11 - 14 10 to 30 minutes
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    Make
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    In this activity, learners use a laser pointer to project a microscopic image of a liquid sample suspended from the tip of a syringe. This activity includes step by step instructions with helpful...

    Over $20 per group Ages 14 - adult 30 to 45 minutes
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    The Exploratorium
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    In this activity, learners explore chemiluminescence and fluorescence. Learners examine 3 different solutions in regular light, in the dark with added bleach solution, and under a black light. This...

    $10 - $20 per group Ages 8 - 18 30 to 45 minutes
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    The Exploratorium
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    With a bit of PVC, a laser, a can/cup, and a small mirror, you can make a device that visualizes you voice or any sound transmitted into the cup/can. Make beautiful patterns on a white wall as you...

    free Ages 8 - adult 10 to 30 minutes
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    The University of Texas McDonald Observatory
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    In this experiment, learners construct an equilateral triangle using graph paper, a pencil, protractor and ruler. They also make a "laser triangle" using a laser pointer and front...

    $1 - $5 per group Ages 14 - 18 45 to 60 minutes
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    American Physical Society
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    In this activity on page 13 of the PDF, learners use a laser pointer (with known wavelength of light) to measure the thickness of a human hair. By shining the laser on a hair, analyzing the...

    $5 - $10 per group Ages 11 - 14 10 to 30 minutes
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    The University of Texas McDonald Observatory
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    Can gelatin (like Jell-O ®) change the speed of light? Learners investigate the refraction properties of gelatin to calculate its index of refraction and discover that as the light travels through...

    $5 - $10 per group Ages 14 - 18 1 to 2 hours
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    The University of Texas McDonald Observatory
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    In this activity, learners set up an experiment to investigate the effects of hot air on the path of a laser beam. They observe the wandering position of the laser beam spot on the wall after the...

    $1 - $5 per group Ages 14 - 18 45 to 60 minutes

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