Exploring Water Properties in Biology

What does the pH scale measure?

• The temperature of a solution

• The acidity or basicity of a solution

• The density of a solution

• The volume of a solution

What is the pH value of neutral water?

• 0

• 7

• 14

• 10

What does cohesion in water refer to?

• Water molecules sticking to other substances

• Water molecules evaporating

• Water molecules sticking to each other

• Water molecules freezing

What is adhesion in water?

• Water molecules sticking to each other

• Water molecules sticking to other substances

• Water molecules evaporating

• Water molecules freezing

What property allows lightweight objects to stand on water?

• Cohesion

• Capillary action

• Adhesion

• High surface tension

What is capillary action?

• Water molecules sticking to other substances

• Water molecules sticking to each other

• Water moving up thin tubes

• Water evaporating

Why does water take a long time to heat up?

• Because it has high cohesion

• Because it evaporates quickly

• Because it has high surface tension

• Because it moderates temperature

How does evaporative cooling help organisms?

• By freezing water

• By heating water

• By removing heat from the skin

• By increasing water density

What happens to water when it freezes?

• It becomes less dense

• It becomes more dense

• It evaporates

• It becomes acidic

Why is water called the universal solvent?

• Because it can freeze

• Because it has high surface tension

• Because it can evaporate

• Because it dissolves many substances