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- 1. Multiple ChoiceWhat property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"PurityPolarity and cohesionHigh heat capacityExpansion upon freezing
- 2. Multiple ChoiceLarge bodies of water do not quickly fluctuate in temperature. Why?Water is a solvent.Water has a high heat capacity.Water acts as a buffer.Water is non-polar.
- 3. Multiple ChoiceWater striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?The insects are light enough so they do not break the hydrogen bonds holding the water molecules togetherThe insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.The insect’s 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
- 4. Multiple Choice
What two elements make up water?Helium and oxygenHydrogen and oxygenhelium and carbonoxygen and carbon - 5. Multiple ChoiceWhat word describes when water is attracted to other substances?cohesionadhesioncapillary actionsurface tension
- 6. Multiple ChoiceWhy does water move from the roots to the leaves of plants?Water is pushed by solutesCapillary action pulls the water molecules like a chainWater is pulled by gravityWater’s cohesion causes it to “pull” towards the leaves
- 7. Multiple ChoiceAttractions between water molecules are calledCovalent bondsIonic bondsPolar bondsHydrogen bonds
- 8. Multiple ChoiceWhich 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.
- 9. Multiple ChoiceWhat property of water helps to moderate earth's temperature?adhesionchohesionSpecific heat capacityLatent heat of vaporization
- 10. Multiple ChoiceWhy does ice float?As water freezes, it expands and its density decreases.As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.As water freezes, air becomes trapped between the hydrogen bonds of water molecules.As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
- 11. Multiple ChoiceWater is polar because...The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.The molecule has two poles, at which the it is colder than other regions of the molecule.The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.The water molecule is neutral.
- 12. Multiple Choice
How many hydrogen atoms are in a water molecule?
5
1
2
0
- 13. Multiple ChoiceWhich types of compounds dissolve easily in water?Polar and NonpolarPolar and IonicNonpolar and IonicCovalent and Nonpolar
- 14. Multiple Choice
The bond that holds the Oxygen and Hydrogen atoms together in a water molecule is a ________ bond.
ionic
Hydrogen
Covalent
Weak
- 15. Multiple Choice
_________ bonds form between ions.
ionic
covalent
hydrogen
polar
- Answer choicesTagsAnswer choicesTags