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This simple hands-on activity demonstrates why the sky appears blue on a sunny day and red during sunrise and sunset.

“Exploring Earth: Investigating Clouds” is a hands-on activity in which visitors create a cloud in a bottle and explore it with laser light.

Learners investigate one factor affecting reaction rates: temperature. In a darkened room, two identical lightsticks are placed in water -- one in hot water and one in cold water.

This activity models the way Landsat satellites use a thermal infrared sensor to measure land surface temperatures.