Sand and silt are both examples of granular materials, which are collections of separate particles and distinct particles, such as raw flour in a container or jellybeans in a jar.The most common forms of sand and silt are composed of tiny fragments of quartz.
Rip tides, also known as rip currents, are strong narrow currents that can pull swimmers out to sea. Some rip tides are so strong that they can drag swimmers away from shore before they realise what is happening. Swimmers should keep an eye out for rip tides while swimming in the sea at the beach. Rip tides can be identified by discoloured water, choppy waves and a foamy surface. They can be filled with debris. Swimmers are told to remember the âthree Rsâ if they become caught in a rip tide.
A rip current is a strong channel of water moving away from the shore. Rip currents typically form along the beach at breaks in the offshore underwater sandbar, but they can also form near structures such as jetties and piers. They can form very quickly and extend as far as 100 yards offshore. Rip currents are a common part of the natural near-shore ocean circulation, and occur at many Florida beaches every day. Rip currents can become stronger and more frequent on certain days because of changes in weather or ocean conditions.