Properties and Behavior of Water

What is unique about water compared to other substances on Earth?

• It is the only substance that can exist as a liquid.

• It is the only substance that occurs naturally in solid, liquid, and gas forms.

• It is the only substance composed of hydrogen and oxygen.

• It is the only substance essential for life.

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What is the chemical formula for a water molecule?

• H2O2

• CO2

• H2O

• CH4

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What type of bond is formed when hydrogen atoms share electrons with an oxygen atom in a water molecule?

• Ionic bond

• Metallic bond

• Hydrogen bond

• Covalent bond

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NGSS.MS-PS1-1

Due to the oxygen atom's stronger attraction for electrons, what kind of charge distribution does a water molecule exhibit?

• It has a uniform positive charge.

• It has a uniform negative charge.

• It is non-polar with no charge.

• It has a slight negative charge around oxygen and slight positive charges around hydrogen.

What type of bond forms between different water molecules due to their polarity?

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

• Metallic bonds

What term describes the attraction between molecules of the same substance, such as water molecules attracting each other?

• Adhesion

• Cohesion

• Capillary action

• Solvency

Which property of water, resulting from its high cohesion, allows some insects to walk on its surface?

• Adhesion

• Capillary action

• Surface tension

• Solvency

What is the term for the attraction between molecules of different substances, such as water molecules sticking to glass?

• Cohesion

• Surface tension

• Adhesion

• Hydrophilicity

The phenomenon where water moves up a narrow tube against the force of gravity, due to the combined effects of cohesion and adhesion, is known as what?

• Surface tension

• Hydrophilicity

• Capillary action

• Solvency

Substances that readily dissolve in water are described as what?

• Hydrophobic

• Non-polar

• Hydrophilic

• Insoluble