Properties of Water

What does it mean that water is a universal solvent?

• It means that water can dissolve many substances, making it essential for life.

• It means that water can only dissolve salts and sugars.

• It means that water can evaporate at any temperature.

• It means that water is the only liquid that can exist on Earth.

Why do water droplets take a spherical shape?

• Because of cohesion.

• Due to surface tension.

• Because of gravity.

• Due to evaporation.

How does water's density change when it freezes?

• Water becomes denser and sinks.

• Water expands and becomes less dense, which is why ice floats.

• Water's density remains the same when it freezes.

• Water evaporates and turns into vapor when it freezes.

What is the significance of water's high specific heat?

• It means water can absorb a lot of heat before its temperature changes, helping to regulate climate.

• It allows water to freeze quickly in cold temperatures.

• It makes water a poor solvent for many substances.

• It causes water to evaporate at lower temperatures.

What is the chemical formula for water?

• H2O

• CO2

• NaCl

• C6H12O6

Why can water striders walk on water?

• Because of surface tension.

• Because they have wings.

• Because they are very light.

• Because of their long legs.

What is the importance of water in living organisms?

• Water is essential for biochemical reactions, temperature regulation, and nutrient transport.

• Water is primarily used for energy storage in cells.

• Water acts as a waste product in metabolic processes.

• Water is only important for aquatic organisms.

Which end of the water molecule has a slightly negative charge?

• The hydrogen end.

• The oxygen end.

• The nitrogen end.

• The carbon end.

What is the role of water in photosynthesis?

• Water is a byproduct of photosynthesis, released during glucose production.

• Water is a reactant in photosynthesis, providing hydrogen and oxygen for glucose production.

• Water acts as a catalyst in the photosynthesis process, speeding up the reaction.

• Water is not involved in photosynthesis and serves no purpose in the process.

What allows you to stretch water with a toothpick?

• Cohesion

• Adhesion

• Surface tension

• Capillarity