What is the chemical formula for water?

• H₂O
• CO2
• NH3
• NaCl
• H2O2

Which elements are found in a water molecule? (Check all that apply)

• Nitrogen
• Hydrogen
• Oxygen
• Helium
• Carbon

About how much of a cells weight does water make up?

• 80-90%
• 65-75%
• 99%
• 75-85%

Water molecules are composed of _______ bonds.

• Polar Covalent
• Non-polar Covalent
• Metallic
• Ionic

_____ bonds are created when multiple water molecules bond. They attach to a partially positive hydrogen atom on one molecule and a negative atom on another. They are very weak.

• Non-polar Covalent
• Ionic
• Hydrogen
• Metallic

Because water is polar...

• it has unevenly distributed electrons that give it a neutral charge
• it has unevenly distributed protons that give it a slightly positive end and a slightly negative end
• it has unevenly distributed electrons that give it a slightly positive end and a slightly negative end
• it has evenly distributed neutrons that give it a neutral charge

Which is not a property of water?

• it is polar
• it has a low surface tension
• it exhibits capillary action
• it bonds to other water molecules through hydrogen bonds

These two properties work together to help water move up a plant stem against gravity?

• Cohesion
• Density
• Universal Solvent
• Adhesion

Water being cohesive leads to it having high _______ that aid small creatures in being able to travel across the water's surface, and is the reason why it hurts so bad when you belly flop into a pool.

• surface tension
• pH
• heat capacity
• polarity

The ability of water to dissolve other substances is due to water being a universal...

• solution
• solvent
• solute
• liquid