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Singing Sand Dunes | National Geographic

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A sonic phenomenon in the Eureka sand dunes of Death Valley have mystified scientists for decades. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.

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This is how a dune could be helpful for.

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It show how v. Shaped valley them are maked

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Good page for destructive forces From Victoria

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Good page for destructive forces From Victoria

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Destructive forces don't always have to be a big event like a tornado. Sometimes, a destructive force can be happening, and we don't even notice it!

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Zion segovia

These are arizona's petrified dunes

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Check out this website it has good articles over erosion, weathering, deposition.

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The Influence of Weather

Weathering and erosion slowly chisel, polish, and buff Earth's rock into ever evolving works of art-and then wash the remains into the sea.

The processes are definitively independent, but not exclusive. Weathering is the mechanical and chemical hammer that breaks down and sculpts the rocks. Erosion transports the fragments away.

Working together they create and reveal marvels of nature from tumbling boulders high in the mountains to sandstone arches in the parched desert to polished cliffs braced against violent seas.

Water is nature's most versatile tool. For example, take rain on a frigid day. The water pools in cracks and crevices. Then, at night, the temperature drops and the water expands as it turns to ice, splitting the rock like a sledgehammer to a wedge. The next day, under the beating sun, the ice melts and trickles the cracked fragments away.

Repeated swings in temperature can also weaken and eventually fragment rock, which expands when hot and shrinks when cold. Such pulsing slowly turns stones in the arid desert to sand. Likewise, constant cycles from wet to dry will crumble clay.

Bits of sand are picked up and carried off by the wind, which can then blast the sides of nearby rocks, buffing and polishing them smooth. On the seashore, the action of waves chips away at cliffs and rakes the fragments back and forth into fine sand.

Plants and animals also take a heavy toll on Earth's hardened minerals. Lichens and mosses can squeeze into cracks and crevices, where they take root. As they grow, so do the cracks, eventually splitting into bits and pieces. Critters big and small trample, crush, and plow rocks as they scurry across the surface and burrow underground. Plants and animals also produce acids that mix with rainwater, a combination that eats away at rocks.

Precipitation

Rainwater also mixes with chemicals as it falls from the sky, forming an acidic concoction that dissolves rock. For example, acid rain dissolves limestone to form karst, a type of terrain filled with fissures, underground streams, and caves like the cenotes of Mexico's Yucatán Peninsula.

Back up on the mountains, snow and ice build up into glaciers that weigh on the rocks beneath and slowly push them downhill under the force of gravity. Together with advancing ice, the rocks carve out a path as the glacier slumps down the mountain. When the glacier begins to melt, it deposits its cargo of soil and rock, transporting the rocky debris toward the sea. Every year, rivers deposit millions of tons of sediment into the oceans.

Without the erosive forces of water, wind, and ice, rock debris would simply pile up where it forms and obscure from view nature's weathered sculptures. Although erosion is a natural process, abusive land-use practices such as deforestation and overgrazing can expedite erosion and strip the land of soils needed for food to grow.

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The Influence of Weather Weathering and erosion slowly chisel, polish, and buff Earth's rock into ever evolving works of art-and then wash the remains into the sea. The processes are definitively independent, but not exclusive. Weathering is the mechanical and chemical hammer that breaks down and sculpts the rocks.

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These  are rapid changes😜😜😱

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Turnados are from different by weathering🌪

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Rivers and streams can make a V Shaped valley by weathering and erosion the land.

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The Earth is over 4 billion years old, but the surface is much younger. How is this possible? Volcanoes, landslides and earthquakes. License: Creative Commons BY-NC-SA More information at http://k12videos.mit.edu/terms-conditions

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Examples for deposition

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Pablo the Pebble

Pablo is a tiny pebble who lives in a little patch of grass near a river. Pablo is not well behaved, so he's always grounded. He is getting really bored of being in the same place all the time, and he often dreams of escaping to the faraway land across the river.

One morning, Pablo wakes up and notices that the wind is blowing a little bit harder than normal. He hears thunder and sees lightning flashing across the sky. Pretty soon, the wind really starts to gust, and big fat raindrops start to fall.

All of a sudden, Pablo is lifted off of the ground by a strong wind and whisked into the fast-flowing river. The water carries him for several minutes until he washes up on the opposite bank. Pablo is in a whole new world. He has just experienced natural processes called erosion and deposition.

What Is Erosion and Deposition?

Pablo's little adventure is an example of what's always happening in nature. Erosion is when materials, like soil or rocks, are moved by wind or water. All these materials are called sediments. Deposition is when those sediments are deposited, or dropped off, in a different location. These processes change the way the surface of the earth looks over time.

Erosion and deposition are constantly happening. After all, wind and water can easily cause materials to move to different places. Next time it rains, find a patch of dirt and watch what happens to it when the drops hit. Does the dirt look exactly as it did before, or was it moved in some way? And when it's windy outside, can you see all of the dust blowing through the air? These are just a couple of examples of erosion and deposition happening all around us.

Now, let's look at some more specific examples of these natural processes.

Examples of Erosion

As we mentioned, when you see dust blowing or rain moving dirt, you are seeing small examples of erosion. Over longer periods of time, these small movements can lead to some big changes. In deserts, it is easy to see the effects of wind erosion. Deserts don't get much water, but they do get a lot of wind. Since they consist of mostly sand and rock, the wind causes a lot of erosion. Sand dunes are constantly shifting and moving, and rocks often get changed into unique shapes.

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erosion & deposition lesson for kids - video & lesson transcript | study.com

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Erosion & Deposition Lesson for Kids - Video & Lesson Transcript | Study.com

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Pablo is a tiny pebble who lives in a little patch of grass near a river. Pablo is not well behaved, so he's always grounded. He is getting really bored of being in the same place all the time, and he often dreams of escaping to the faraway land across the river.

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This is a pic a a glacier!

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Grand canyon

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Zion segovia

This video shows you how a group of petrified dunes were formed over two million years ago.

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Preserved 200 million year old petrified dunes from the Navajo Formation in Arches National Park!

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Land forms can be made or destroyed by strong water wind or ice

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Land forms can be made or destroyed by strong water wind or ice

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Eduardo

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Sand dunes help if theirs a hurricane by the dunes. The hill stay up for a bit until it breaks. If theirs house behind a  dune it won't break until the hurricane breaks the dune and attacks the land.

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Canyon caused by water.

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It's educational and funny

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This is a Canyon in Utah , canyons are deep gorges that have water flowing through it - Victoria

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E

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Glaciers are formed when snow stays in one place.then it forms into ice.when a glacier goes down the mountain or hill it leaves behind
sedmients.U shaped valleys are formed by glaciers.

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This explains landforms and what causes them to form.

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This graphic shows examples of different types of landforms.

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Dunes are made by wind pushing sand on to beach so it could create a dune or dunes on the beach.

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A dune is a hill of sand that becomes a type of rock called sand stone.

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A dune is a hill of sand that becomes a type of rock called sand stone.

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LG. Types of rapid changes are hurricanes, landslides,earthquakes  and volcanic eruptions. Luis