Chapter 2 Review

The property of water that allows a paperclip to float on top of it

• adhesion

• capillary action

• high heat capacity

• surface tension

How does capillary action happen?

• water is polar
• it drags other water molecules up the tubes
• it sticks to the tubes
• ALL OF THESE REASONS

Refer to the picture of water sticking to a leaf; this is occurring because of:

• Adhesion

• Cohesion

What kind of bonds are responsible for the unique cohesion, surface tension, and adhesion properties of water molecules?

• hydrophobic bonding

• ionic bonding

• hydrogen bonding

• polar covalent bonding

Which of the following properties of water is responsible for the formation of raindrops?

• Cohesion

• Adhesion

• high thermal energy

• high kinetic energy

What is the chemical symbol of water?

• H2O

• CO2

• O2

• N2

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NGSS.MS-PS1-1

 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

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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 water to flow against gravity?

• Polarity

• Cohesion

• Capillary Action

• Adhesion

What kind of bond is formed between the two hydrogen atoms and the single oxygen atom?

• hydrogen bonds

• covalent bonds

• ionic bonds

• disulphide bonds

Tags

NGSS.MS-PS1-1