1001 Space Earth Earth Rocks and Minerals Landscape Sea Weather and Climate Natural Disasters Resources Nature History Human World Science and Technology

Choose a Page:What is the rock cycle?What is weathering?What shapes the cliffs along the s...Do rocks dissolve?Can living things break down rocks?How are caves made?*How do sand dunes move?*Why do desert rocks have fantastic...How do rivers form?What makes waterfalls?What is scree?What is an oxbow lake?Is all erosion slow? How do sand dunes move? Sand dunes are masses of loose sand that move across the ground in wind. The grains are blown up the windward side of a dune until they reach the top; then they drop down into the shelter of the lee (the side away from the wind). Other grains are blown up and over, burying the first. This continued action moves the dune across the landscape.   Previous: Back Book: 1001 Section: Earth Chapter: Landscape