Heating a liquid (or any substance for that matter) causes it to expand, decreasing its density. In cooler liquids, the particles are a little closer to each other, so the liq. is more dense. Dense substances sink to the bottom (you could think of them as being a little heavier due to their higher density)
No. Venus is far too hot for water to exist on its surface.
Upwelling occurs when wind pushes surface ocean water away from the coastline, causing deeper, colder, nutrient-rich water to rise and replace it. This brings nutrients to the surface, fueling the growth of phytoplankton and supporting a productive marine ecosystem.
Water, when cold, would sink as would other substances as the molecules in in become less active. The unique exception is when water freezes it rises, due to the molecules lining up to form crystal structures allowing spaces and thus making it act as a floatation device. Without this extraordinary property of water, life, as we know it, would not exist.
The phenomenon you are referring to is called "cold deep water upwelling." It occurs when cold, nutrient-rich water from deep ocean currents rises towards the surface as it moves towards the equator. This process plays a crucial role in maintaining oceanic ecosystems by transporting nutrients and supporting marine life.
It is too cold for liquid water to exist on the surface
Rises to the surface.
The sun heats the water surface. Warm water has a lighter density than cold water so the warmer water floats on the surface of the colder water.
The sun heats the water surface. Warm water has a lighter density than cold water so the warmer water floats on the surface of the colder water.
The sun heats the water surface. Warm water has a lighter density than cold water so the warmer water floats on the surface of the colder water.
freeze water as ice cubes then put it on water and it floats Liquid fresh water floats on salt water Warm water floats on cold water (water's greatest density is when it is 4 degrees Celsius).
the warm water floats
HOT rises COLD sinks
because a soda can is full of air. Air is lighter than water, and is therefore boyant and the can floats.
Nothing very exciting happens because as the cold water would rise it would push the warm water down. This would cause the cold water to heat up and the warm water to cool off. This creates a cycle of cooling and warming.
The reason for this is convection, when the temperature rises the liquid (in this case water) expands, causing it to rise above the cold water which is denser due to the lower temperature. So the hot water rises and the cold water sinks, making a convection current.
Cold water is rich in oxygen and plankton, krill, etc. Warm water rises and brings the food carried in the cold water towards the surface, and so feeds the fish shoals.
Think of a pot of boiling water. The burner makes the heat, the heat rises, and the cold water replaces it, then the cold water gets hotter and rises. It's a cycle