Ever wonder where dirt gets that fresh smell? Find out on this Moment of Science.
In the desert, the absence of water means little or no chemical weathering can take place. Instead, erosion, frost, sedimentation, and the huge temperature fluctuations between day and night break down the rocky surface into sand or gravel.
While the air underneath black fabric warms up faster than the air underneath white fabric, at the same time, black fabric provides more shade than white fabric, and this decreases the amount of light that directly reaches the skin.