Properties of Water

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Attractions between the positive Hydrogen atom of one water molecule and the negative Oxygen atom of another water molecule are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

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

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 of the following is LEAST likely to dissolve in water?

• nonpolar lipids

• polar sugar molecules
• salt made of a positive sodium ion and a negative chlorine ion

• all of the substances will dissolve easily in water

Large bodies of water, such as lakes and oceans, do not quickly fluctuate (change) in temperature. What is the reason for this phenomenon?

• Water is less dense as a solid.

• Water is a universal solvent.

• Water has a high heat capacity.
•  Water has high surface tension.

Tags

NGSS.MS-ESS2-6

 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

Why does water move from the roots to the leaves of plants?

• Water is pushed by solutes
• Capillary action, the combination of adhesion and cohesion, pulls the water molecules like a chain

• Water is pulled by gravity
• Water has a high specific heat.

Tags

NGSS.MS-LS2-1

Freezing point of water is

• 100 degrees Celsius
• 0 degrees Celcius
• 0 degrees Fahrenheit

Tags

NGSS.MS-PS1-4

The freezing and melting points of water are the same.

• True
• False

Tags

NGSS.MS-PS1-4