Water properties and Distribution of Water

What does it mean when we say that a molecule is polar?

• Polar molecules have an unequal sharing of protons among atoms

• Polar molecules have an unequal sharing of electrons among atoms

Tags

NGSS.MS-PS2-3

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

• the Oxygen end

• the Hydrogen end

Which end of a water molecule has a slightly negative charge?

• the Oxygen end

• the Positive end

Bonds among water molecules are called

• covalent bonds

• hydrogen bonds

• polar bonds

Some insects can walk on water because of surface tension

• True

• False

Water is a super

• solute

• solvent

• mixture

When water freezes, it

• becomes less dense

• becomes more dense

• contracts

Tags

NGSS.MS-PS1-4

Water resists changing its temperature and has a high

• universal solvent

• surface tension

• specific heat

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If you add heat to water molecules the molecules

• move slower

• stop moving

• move faster

Tags

NGSS.MS-PS1-4

What percentage of Earth's water is salt water?

• 3%

• 50%

• 97%