The Properties of Water

What is water?

• An atom
• A molecule composed of 2 parts Oxygen and one part Hydrogen
• A molecular compound composed of 2 parts Hydrogen and one part Oxygen
• A pure substance composed of 2 parts Hydrogen and one part Oxygen

What is the chemical formula for water?

• H20
• h₂o
• H₂O₂
• H₂O

Is the density of ice lower, higher, or the same as liquid water?

• Lower

• Higher

• The same

• Um... what is density again

Why does ice have a lower density than liquid water?

• Because it floats

• Because it is a crystal

• Because the molecules expand in volume as water freezes into a crystal

• Because ice is colder than water

What is adhesion?

• Water's ability to stick to itself
• Water's ability to stick to other substances
• The strength of the cohesion of all the water molecules combined
• Tape, glue and other adhesives

What is cohesion?

• Water's ability to stick to itself
• Water's ability to stick to other substances
• The strength of the cohesion of all the water molecules combined
• Tape, glue and other adhesives

What is surface tension?

• Water's ability to stick to itself
• Water's ability to stick to other substances
• The strength of the cohesion of all the water molecules combined
• Tape, glue and other adhesives

Water is essential for life. Its special properties make water the single most important molecule in plant life.

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 temperature.

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature.

What is the reason for this?

• Water is an acid.

• Water is a versatile solvent.

• Water has a high heat capacity.

• Water acts as a buffer.

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

•  Ice is colder than liquid water.
• Ice is less dense than liquid water.
• Ice is more dense than liquid water.
• Ice is warmer than liquid water.