Properties of Water

What does it mean when a molecule is said to be “polar”?

• The molecule has tendency to absorb a lot of heat, therefore it remains 'cold' easily

• The molecule has an even distribution of charges, all parts are positive

• The molecule has an even distribution of charges, all parts are negative

• The molecule has an uneven distribution of charges, some parts are positive while others are negative

Tags

NGSS.MS-PS2-3

Which of the following is not a special property of water?

• Water has the ability to moderate its temperature

• Water is polar, therefore it is very adhesive

• Water contracts when it freezes

• Water is polar, therefore it is very cohesive

Which special property of water is responsible for the fact that water and oil do not mix?

• density

• mass

• phase

• polarity

A molecule that has a partial positive charge on one side and a partial negative charge on the other side is called a

• nonpolar molecule.

• polar molecule.

• charged molecule.

• bipolar molecule.

Why does ice stay at the top of oceans instead of sinking to the bottom?

• Ice is colder than liquid water.

• Solid ice is less dense than liquid water.

• Solid ice is more dense than liquid water.

• Ice is warmer than liquid water.

Water is often called the "universal solvent" because many substances can be dissolved in water. Which properties of water allow it to be such a versatile solvent?

• purity and neutral pH

• polarity and cohesion

• high heat capacity and high surface tension

• polarity and high heat capacity

According to the figure, which of the following statements best describes a water molecule?

• A water molecule has one negatively charged oxygen atom and two positively charged hydrogen atoms

• A water molecule has two negatively charged oxygen atoms and one positively charged hydrogen atom

• A water molecule has one positively charged oxygen atom and two negatively charged hydrogen atoms

• A water molecule has two positively charged oxygen atoms and one negatively charged hydrogen atom

Tags

NGSS.MS-PS1-1

Which of the following properties of water enables it to move from the roots to the leaves of plants?

• Water expands as it freezes

• Water is an excellent solvent

• Water exhibits cohesive behavior

• Water is able to moderate its temperature

Which property of water allows it to have a high surface tension?

• Cohesion

• Adhesion

• Density

• Polarity

What is the primary reason ice floats on water?

• Ice is denser than water

• Ice is less dense than water

• Ice has a higher temperature than water

• Ice has a lower temperature than water