Chapter 15 Water Properties

What two elements make up water?

• Helium and Oxygen
• Hydrogen and Oxygen
• Helium and Carbon
• Oxygen and Carbon

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NGSS.MS-PS1-1

A water strider can skate along the top of a pond because:

• specific heat
• surface tension
• adhesion
• capillary action     

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What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Why is water considered a polar molecule?

• The oxygen end is slightly negative and the hydrogen end is slightly positive
• The hydrogen end is slightly negative and the oxygen end is slightly positive
• The hydrogen and oxygen are covalently bonded     
• Because it is hydrophobic

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

• Water is pushed by solutes
• Capillary action pulls the water molecules up 
• Water is pulled by gravity
• Water’s cohesion causes it to “pull” towards the leaves

Attractions between water molecules are called

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

The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water’s ability to be attraction to other water molecules.

• adhesion
• capillary action
• cohesion
• surface tension

Which is NOT a unique property of water?

• Frozen water floats on liquid water.
• Water covers most of the Earth’s surface and retains a large amount of heat.
• Water molecules stick to each other through hydrogen bonds.
• Water cools very rapidly.

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What property of water helps to moderate earth's temperature?

• adhesion
• chohesion
• Specific heat capacity
• Latent heat of vaporization

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The reason the water balloon did NOT pop while held over a flame is water's _________.

• Less dense than air.
• Hydrogen bonds between water molecules.
• Polarity.
• High specific heat capacity.

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NGSS.MS-PS1-4