WEBVTT

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[upbeat guitar music]

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Exploring Craters

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Today we will simulate making lunar craters and

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use ultraviolet light to observe materials that cannot be seen with the naked eye.

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Supplies: newspapers or plastic sheet, flat pan or bin, flour or powdered sugar, sand or cat litter, baking cocoa,

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marbles, ultraviolet light, safety goggles, and an optional camera

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First we'll put on our safety goggles.

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Next, spread newspaper or a plastic table cloth to protect the floor or table during this activity.

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Place your pan or storage bin on the covered area.

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Cover the bottom of the pan with a layer of sand or cat litter about 4 cm deep.

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Next, cover the sand layer with white flour or powdered sugar as a gluten-free alternative, about 2 cm thick.

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In isolated sections of the pan, sprinkle powdered whitening agent over the flour.

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Add a layer of baking cocoa on top completely covering the layers beneath.

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From a standing position, drop a marble or other small impactor into the pan.

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Carefully remove the impactor and make observations of the disturbed the surface.

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Now shine a handheld ultraviolet (UV) light on the surface. What new observations are revealed with the UV light?

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Drop another impactor and make more observations with and without the UV light.

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Try taking a digital image of the craters in regular light and another image under the UV light.

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What new observations are revealed when you compare the two images?

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Have fun exploring craters!

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[upbeat guitar music]