REVIEW- Properties of Water

In a water molecule, there is a slight __ charge around oxygen and a slight __ charge around the hydrogens

• positive, negative

• negative, neutral

• neutral, positive

• negative, positive

Water molecules are attracted to the polar parts of plant roots, this is an example of

• adhesion

• cohesion

• surface tension

• specific heat capacity

Water molecules hydrogen bonding with other water molecules and forming water droplets is an example of

• surface tension

• adhesion

• cohesion

• pH scale

What is the chemical symbol of water?

• H2O

• CO2

• O2

• N2

Tags

NGSS.MS-PS1-1

What is cohesion?

• The ability of a molecule to "stick" to itself

• The ability of a molecule to "stick" to other molecules

• Large amounts of energy are required to change the temperature of a substance

• A well-organized and efficient team

This individual is ice fishing. They cut through the top layers of ice to reach the water and fish below. What property of water allows for this to happen?

• Expansion Upon Freezing

• Universal Solvent

• Ability to Moderate Temperature

• Cohesive Behavior

What property of water allows for water to act as a temperature regulator for the world?

• Cohesive Behavior

• Expansion Upon Freezing

• High Specific Heat

• Universal Solvent

Water is a universal solvent because it...

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

 Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?

• The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together
• The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet
• The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface
• The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

The tightness across the surface of water that enables paper clips to float is ____________.

• adhesion
• capillary action
• surface tension
• polarity