What does it mean for a molecule to be polar?

• It is non-reactive

• It has a low specific heat

• It has a charge

• It is highly electronegative

What is the highest electronegative element aside from fluorine?

• Carbon

• Hydrogen

• Nitrogen

• Oxygen

What causes the increase in electronegativity as we move across the periodic table?

• Increase in protons in the nucleus

• Decrease in protons in the nucleus

• Increase in electrons in the nucleus

• Decrease in electrons in the nucleus

What type of charge does the oxygen atom in a water molecule have?

• Positive

• Negative

• Variable

• Neutral

What is the attraction between the positive hydrogen and the negative oxygen in a water molecule called?

• Hydrogen bond

• Covalent bond

• Ionic bond

• Polar bond

What property of water is caused by the cohesion of water molecules?

• Surface tension

• Solvent nature

• Capillary action

• High specific heat

What is the driving force behind the movement of water up a tree through capillary action?

• Gravity

• Magnetic force

• Chemical reaction

• Energy from the sun

What property of water allows it to moderate the temperature of a region surrounded by water?

• High specific heat

• Low density

• Low specific heat

• High density

Why does ice float on water?

• It forms a three-dimensional matrix

• It becomes denser as it cools

• It has a high specific heat

• It becomes less dense as it cools

What property of water allows it to dissolve materials quickly?

• Low specific heat

• High density

• Non-polar nature

• Good solvent nature