Properties of Water

The chemical compound of water is

• HO
• H₂O
• H₃O
• HO₂

Tags

NGSS.MS-PS1-1

Why does Ice float?

• It is less dense than in liquid form.
• It is more dense than in liquid form.
• It has more surface tension
• None of the above

Bonds between water molecules are called

• Covalent bonds

• Ionic bonds

• Polar bonds

• Hydrogen bonds

Water is polar because...

• The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
• The molecule has two poles, at which the it is colder than other regions of the molecule.
• The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
• The water molecule is neutral.

Tags

NGSS.HS-ESS2-5

Water is known as the universal solvent.

• True
• False

A molecule with electrically charged areas is called a _______________.

• magnet
• polar molecule
• solution
• electrical molecule

Tags

NGSS.HS-PS1-3

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

Which end of the water molecule has a slightly positive charge?

• the oxygen end
• the hydrogen end
• both ends are slightly positive
• neither end is positive

Which statement best describes an effect of the low density of frozen water in a lake?

• When water freezes, it contracts, decreasing the water level in a lake.
• Water in a lake freezes from the bottom up, killing most aquatic organisms. 
• When water in a lake freezes, it floats, providing insulation for organisms below.
•  Water removes thermal energy from the land around a lake, causing the lake to freeze.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Water binding with water

• Adhesion

• Cohesion

• Ability to dissolve substances

• High specific heat

Tags

NGSS.HS-ESS2-5