Currents are the continuous, directed movements of water in oceans, rivers, and lakes. They can be caused by various factors, including wind, temperature differences, and the Earth's rotation. For example, the Gulf Stream is a powerful ocean current that transports warm water from the tropics to the North Atlantic, influencing climate and weather patterns. In addition to ocean currents, there are also river currents that flow in a specific direction, shaped by the landscape and gravity. These currents can affect the movement of boats and the distribution of nutrients in the water, playing a vital role in the ecosystem.