What would happen to aquatic life if water contracts on cooling to 0oc and expands on heating?

Answer: Aquatic life would keep on living because that’s what water does. Note the significant drop in density (expansion) at 0 degrees and the increase in density(contraction) as the water cools toward 0 degrees and as the ice cools below 0 degrees.

What happens to the molecules of water in the container when the temperature increases?

An increase in temperature caused the water molecules to gain energy and move more rapidly, which resulted in water molecules that are farther apart and an increase in water volume. When water is heated, it expands, or increases in volume. When water increases in volume, it becomes less dense.

What happens to water when it is cooled?

When water is cooled, the water molecules move slower and get closer together. This makes cold water more dense than room temperature water. Since cold water is more dense, it sinks in the room temperature water.

What will happen to aquatic life?

Aquatic life forms mainly suffer beacause of water pollution because of loss of enough amount of fresh dissolved oxygen in water bodies due to raised volume of toxicity in water. Toxicity which is a result of water pollution leads to death of aquatic life forms.

How does fishes and aquatic animals survive when the pond gets covered with thick ice?

But the water beneath this thick layer of the ice does not freeze into a solid but remains as a liquid. This expansion enables marine life (fishes or marine plants) which exist in the colder regions to survive, even when the water solidifies on the surface and below the surface is still liquid.

Why do water expands on freezing?

When water freezes, its molecules get arranged in a crystalline structure, thereby attaining a defined shape. This crystalline structure is less dense, and since there are gaps between individual molecules in the structure, the overall volume increases and water ‘expands’.

What happens to the molecules of water in the container?

The liquid molecules escape into the gas phase, becoming water vapor. Vaporization is the process in which a liquid is converted to a gas. If the water is instead kept in a closed container, the water vapor molecules do not have a chance to escape into the surroundings and so the water level does not change.

What happens to the water molecules when heat is removed?

Water can exist as a solid (ice), liquid (water) or gas (vapour or gas). Removing heat causes water (a liquid) to freeze to form ice (a solid). When water changes to a solid or a gas, we say it changes to a different state of matter. Even though the water’s physical form changes, its molecules stay the same.

Why does water expand when cooled?

The liquid contracts as it is cooled; because the molecules are moving slower they are less able to overcome the attractive intermolecular forces drawing them closer to each other. When liquid water is cooled, it contracts like one would expect until a temperature of approximately 4 degrees Celsius is reached.

What happens to the water that does not fall into oceans or other water sources when it rains?

Runoff, and groundwater seepage, accumulate and are stored as freshwater in lakes. Not all runoff flows into rivers, though. Much of it soaks into the ground as infiltration.

How does temperature affect aquatic life?

Temperature is also important because of its influence on water chemistry. Warm water holds less dissolved oxygen than cool water, and may not contain enough dissolved oxygen for the survival of different species of aquatic life. Some compounds are also more toxic to aquatic life at higher temperatures.

What are the effects of water pollution on aquatic life?

The effect of water pollution is more on aquatic life, because their existence depends on water and when there is any disturbance in their ecosystem, the impact is maximum on them. In polluted water, due to abundant growth of algae, the oxygen content becomes lesser, causing the death of fishes and other organisms.

How do aquatic life survive when the water temperature falls below?

With a further drop in temperature water on top forms ice and become a bad conductor of heat. This stops the heat from escaping the water body and helps the aquatic life to survive. Hence, aquatic life can survive even when the temperature reaches or falls below.

Does water expand or contract on heating and cooling?

Generally, on heating water it expands and on cooling it contracts. But in case of liquid, it shows unusual behaviour from to . Between this range, water doesn’t follow the Law of Contraction and Expansion i.e., as you cool down the water its density increases till and reaches its maximum range.

What are the applications of anomalous expansion of water?

Between a certain range of temperatures, it shows anomalous expansion of water which has many applications. This helps in the survival of marine life, this is one of the major importance of this behaviour of water, and there are many applications which are discussed. Generally, on heating water it expands and on cooling it contracts.

How does temperature affect the formation of water from ice?

The rise in temperature above will cause the ice to form water not because of the O-O bond but due to H-O bond attraction. The lattice structure of ice prevents the movement of water molecules. But since the H-O bond is not as strong as the O-O bond it will expand and hence occupies more space.