2.1-2.3 Review

What is the correct chemical formula for water?

• H₂O

• HO₂

• H₂O₂

• ₂H₁O

Which of the following is an example of COHESION?

• water sticking to water

• water sticking to glass

• oil sticking to plastic

• hydrogen sticking to oxygen

Water sticks well to many materials. What term relates to this property of water?

• cohesion

• adhesion

• density

• surface tension

Why does ice float?

• water expands when it freezes, making ice less dense than water

• water compacts when it freezes, making ice more dense than water

• hydrogen bonds in water push the ice to the surface

• ice is afraid of water, and avoids it

At what temperature does water Freeze?

• 0^o C

• 100^o C

• 32^o C

• -273^o C

At what temperature does water Boil?

• 0^o C

• 100^o C

• 32^o C

• 212^o C

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

Which characteristic of water will allow a paperclip to remain floating on water when the paperclip is gently placed on top of the water?

• adhesion
• surface tension
• solvent properties
• nonpolar

What is it called when plants give off water vapor as a waste product?

• condensation
• evaporation
• sublimation
• transpiration

During which stage do clouds form?

• condensation
• evaporation
• precipitation