2. In the water cycle, energy and matter move when the sun heats water, causing it to evaporate and turn into vapor. This vapor moves to the atmosphere, cools, and condenses into clouds, then falls as rain or snow. These processes show how energy and matter transfer through the environment.3. Without energy flow, important processes like evaporation stop. Without evaporation, the water cycle cannot continue, and water does not move through the environment. This causes the system to stop working and can harm living things that depend on it.4.A system is a group of connected parts that work together as one. For example, the water cycle is a system where water moves between land, air, and oceans through different processes, keeping everything balanced.