Скачать с ютуб How is sand formed? Science Behind it? | How is sand formed | sand for kids в хорошем качестве

How is sand formed? Science Behind it? | How is sand formed | sand for kids

How is sand formed? Science Behind it? Sand is created when rocks break down over time through a process called weathering. This process can take millions of years. How weathering creates sand Rocks are broken down into smaller pieces by wind, rain, ice, heat, cold, plants, and animals. The broken pieces of rock are carried by water and wind. The pieces continue to break down into smaller pieces until they become sand. Where does sand end up? Some of the broken pieces of rock end up in oceans and eventually wash ashore to form beaches. Sand from rivers is collected and used in construction. Sand dunes are created by wind deposition or dry conditions. Sand composition How is sand formed | sand for kids Science for kids Science explained Science projects The environmentalist Rachel Carson wrote, "In every curving beach, in every grain of sand, there is a story of the Earth." Science videos for kids Science videos for 1st graders educational videos for 1st graders educational videos for adults educational videos for special needs adults Sand videos Sand comes from many locations, sources, and environments. Sand forms when rocks break down from weathering and eroding over thousands and even millions of years. Rocks take time to decompose, especially quartz (silica) and feldspar. Often starting thousands of miles from the ocean, rocks slowly travel down rivers and streams, constantly breaking down along the way. Once they make it to the ocean, they further erode from the constant action of waves and tides. The tan color of most sand beaches is the result of iron oxide, which tints quartz a light brown, and feldspar, which is brown to tan in its original form. Black sand comes from eroded volcanic material such as lava, basalt rocks, and other dark-colored rocks and minerals, and is typically found on beaches near volcanic activity. Black-sand beaches are common in Hawaii, the Canary Islands, and the Aleutians. The by-products of living things also play an important part in creating sandy beaches. Bermuda's preponderance of pleasantly pink beaches results from the perpetual decay of single-celled, shelled organisms called foraminifera. Less common but no less inviting beaches, devoid of quartz as a source of sand, rely on an entirely different ecologic process. The famous white-sand beaches of Hawaii, for example, actually come from the poop of parrotfish. The fish bite and scrape algae off of rocks and dead corals with their parrot-like beaks, grind up the inedible calcium-carbonate reef material (made mostly of coral skeletons) in their guts, and then excrete it as sand. At the same time that it helps to maintain a diverse coral-reef ecosystem, parrotfish can produce hundreds of pounds of white sand each year! So the next time you unfurl your beach towel down by the shore, ponder the sand beneath you, which, as Rachel Carson said, is telling you a story about the Earth. You may be about to comfortably nestle down in the remains of million-year-old rocks. Then again, you may soon come to rest upon an endless heap of parrotfish poop. Science experiments Science videos Top 5 Easy Science Experiments for kids to do at home with Ryan's World! Fun DIY learning activities for family to do together! There are fun science experiments like Leak Proof Bag, DIY rainbow, Skittles, soap microwave, and washing hands peppers. science experiments for kids Please subscribe o my channel we make science videos for kids or science videos can be watched for adults too and this content is filtered save for children and parents can subscribe This is from an MIT alumini   / ashwini-i-7260867b