• Take the temperature readings on a sunny day of at least two pairings of mater

Question

• Take the temperature readings on a sunny day of at least two pairings of materials (4 items total) such as: concrete versus black top and bare soil versus sand. There are an infinite number of possible pairings, such as a light color automobile hood vs to a dark color auto hood; a piece of steel versus a piece of aluminum or wood of the same size; temp inside an auto with all windows shut versus the temp outside of the auto; and others. Use your creativity for items to compare. • Allow sufficient time for the thermometer to record an accurate temperature for each item you chose. • Record the outside temperature for the day your do your testing and the following for each of the 4 items you test: o Type of material o Texture of material o Color of material o Temperature o Length of time you allowed for the thermometer to take the readings Are there differences in the temperature values? What causes the differences?

Explanation / Answer

Use the infrared (IR) thermometer to record the following temperatures. When using the IR thermometer, put the instrument CLOSE to the surface being measured, maybe an inch or couple of centimeters away. You should turn the laser pointer off, it is misleading. DO NOTstand several feet away and just aim the instrument using the laser pointer, you will not get an accurate reading on the small surface area required for this lab. Sometimes the side of the IR thermometer shows the angle of measurement, this helps explain why you need to hold the instrument close to what is being measured. Same with the sky measurements below, try an find as large an area of clear sky or cloud as possible to aim at.

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