No, river water is not rainwater. River water is the accumulation of rainwater, as well as water from other sources such as melting snow, groundwater, and runoff from the surrounding land. Rainwater refers specifically to the water that falls from the atmosphere as precipitation. Once rainwater reaches the ground, it can flow into rivers and become part of the river water system. **

Fresh water and salt water don't mix easily because of their different densities and chemical compositions. Salt water is denser than fresh water due to the dissolved salts, so it tends to sink below the less dense fresh water. Additionally, the presence of salt in salt water creates a barrier that prevents the two types of water from easily mixing. This difference in density and chemical composition creates a stratification that keeps the two types of water separate. **

Boiling river water can kill most of the harmful bacteria, parasites, and viruses that may be present, making it safer to drink. However, boiling may not remove certain chemicals or pollutants that could be present in the water. It's important to consider the source of the river water and any potential contaminants before deciding whether it is safe to drink, even after boiling. It's always best to purify water using a water filter or chemical treatment if possible. **

The Arctic Ocean has fresh water. This is because it is covered by a thick layer of ice made up of frozen freshwater. As the ice melts, it releases fresh water into the ocean. This makes the Arctic Ocean one of the least salty oceans in the world. **

Freshwater is considered sweet because it has a low concentration of dissolved salts and minerals compared to seawater. The taste of freshwater is less salty because it lacks the high levels of sodium and other minerals found in seawater. This lower salinity level gives freshwater a more neutral or "sweet" taste in comparison. **

Cats do not necessarily prefer stale water over fresh water. In fact, cats are known to have a preference for fresh, clean water. Stale water may be less appealing to cats because it can contain more bacteria and impurities. It's important to regularly change a cat's water to ensure it stays fresh and clean, which can help encourage them to drink more. **

Cats may prefer stale water to fresh water because they are instinctively drawn to still water sources in the wild, as they associate running water with potential contamination. Stale water may also have a different taste or smell that cats find more appealing. Additionally, some cats may simply prefer the taste or temperature of stale water over fresh water. **

Yes, you can boil frozen salmon in water. However, it is generally recommended to thaw the salmon before cooking it to ensure even cooking and better texture. If you do choose to boil frozen salmon, make sure to add it to the boiling water and cook it for a few extra minutes to ensure it is fully cooked. Keep in mind that boiling frozen salmon may result in a slightly different texture compared to thawed salmon. **