Water and Its Properties Quiz

Water exists in solid, liquid, and gas states. In solid form, it's ice, in liquid form, it's water, and in gas form, it's water vapor.

Water can be found in two forms: free water, like the water in a lake, and combined water, like the water in a plant.

The chemical formula for water is H₂O, which means each water molecule has two hydrogen atoms and one oxygen atom.

It covers over 70% of Earth's surface but only about 2.5% is freshwater.

The water cycle describes how water moves between the Earth's surface, atmosphere, and oceans. Stages include evaporation, condensation, precipitation, and runoff.

The temperature at which water changes from liquid to gas under standard pressure (760 mm Hg).

The temperature at which water changes from liquid to solid under standard pressure (760 mm Hg).

The amount of heat energy required to change 1 gram of ice at its melting point to 1 gram of water at the same temperature (0°C) without changing its temperature.

The amount of heat energy required to change 1 gram of boiling water at its boiling point to 1 gram of steam at the same temperature (100°C) without changing its temperature.

Water's unusual property that causes it to expand upon freezing, making ice less dense than liquid water.

The amount of heat energy required to raise the temperature of 1 gram of water by 1 degree Celsius.

The maximum density of water occurs at 4°C, not at 0°C. This is essential for the survival of aquatic life in cold regions.

Water is a vital component of all living organisms and is essential for maintaining life.

The ability of water to dissolve many substances, making it a good solvent for solids, gases, and liquids.

Water molecules have a bent shape with two hydrogen atoms carrying positive charges and one oxygen atom carrying a negative charge. This polarity allows water to attract and interact with other polar molecules and ions.

Water has a high dielectric constant, which means it reduces the electrostatic force between positive and negative ions. This property allows water to dissolve ionic compounds like salt.

Even seemingly insoluble substances dissolve in water to some extent. For instance, glass can dissolve slightly in water.

This property of water is due to its high heat capacity, which means it requires a lot of energy to raise its temperature. This makes water a good coolant, as it can absorb heat without changing temperature drastically.

Water's ability to dissolve a wide range of substances makes it a central part of various natural processes like weather, plant growth, and the formation of minerals.

The high specific latent heat of solidification means water requires a lot of energy to change from a liquid to a solid. This is why large bodies of water like lakes and rivers don't freeze instantly in cold weather.

The amount of a gas dissolved in a specific volume of water.

Both marine and freshwater organisms rely on dissolved oxygen in water for respiration.

The process by which aquatic plants use dissolved carbon dioxide to produce energy.

The composition of air dissolved in water is different from the air in the atmosphere, with a higher proportion of oxygen.

A chemical reaction where carbon dioxide reacts with limestone forming calcium bicarbonate used by some marine organisms for shell formation.

Dissolved salts and minerals are crucial for plant growth, providing essential nutrients and adding flavor to water.

A simple experiment where heating water releases dissolved gases demonstrating their presence.

Oxygen, a gas found in air, dissolves in water, providing marine life with a vital resource for respiration.