Properties of Water and Its Effects

The video tutorial covers the properties of water, including its neutrality, cohesion, adhesion, surface tension, capillary action, temperature moderation, evaporative cooling, and its role as a universal solvent. Each property is explained with examples, highlighting water's unique characteristics and its importance in biological and environmental contexts.

What is the pH level of pure water?

• 11

• 7

• 5

• 9

Which property of water allows it to form droplets?

• Surface Tension

• Capillary Action

• Adhesion

• Cohesion

What is the term for water's ability to stick to other substances?

• Surface Tension

• Evaporative Cooling

• Adhesion

• Cohesion

Which property allows insects like water striders to walk on water?

• Capillary Action

• Surface Tension

• Cohesion

• Adhesion

What is capillary action?

• Water's ability to move through thin tubes

• Water's ability to resist temperature changes

• Water's ability to dissolve substances

• Water's ability to form droplets

Why does water take a long time to change temperature?

• It has a high surface tension

• It is a universal solvent

• It has a high specific heat capacity

• It expands when frozen

How does evaporative cooling help organisms?

• By dissolving nutrients

• By forming a protective layer

• By increasing surface tension

• By carrying heat away as water evaporates

What happens to water when it freezes?

• It expands

• It becomes denser

• It loses its polarity

• It dissolves more substances

Why is water considered a universal solvent?

• It has a high boiling point

• It is non-polar

• It can dissolve many substances

• It has a low freezing point

What percentage of the human body is water?

• 70%

• 60%

• 50%

• 80%