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- 1. Multiple ChoiceCapillary action is the result of adhesion. Which aspect of water is responsible for this?Non-polar covalent bonds that enable water to dissolve other substancesPolar covalent bonds that join molecules of water to other substancesHydrogen bonds between water and another substanceIonic bonds that enable electrons to flow through water and into another substance
- 2. Multiple ChoiceWhich of the following properties of water enables it to move from the roots to the leaves of plants?Water expands as it freezes.Water is an excellent solvent.Water exhibits cohesive behavior.Water moderates temperature.
- 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 can water have no net charge but have slight charges in different parts of the molecule?The oxygen end is slightly negative and the hydrogen end is slightly positiveThe hydrogen end is slightly negative and the oxygen end is slightly positiveThe hydrogen and oxygen ends change in polarityBecause it is hydrophobic
- 7. 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
- 8. Multiple ChoiceAttractions between water molecules are calledCovalent bondsIonic bondsPolar bondsHydrogen bonds
- 9. Multiple ChoiceThe 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.adhesioncapillary actioncohesionsurface tension
- 10. 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.
- 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 ChoiceA molecule with electrically charged areas is called a _______________.magnetpolar moleculesolutionelectrical molecule
- 13. Multiple ChoiceWhich end of the water molecule has a slightly positive charge?the oxygen endthe hydrogen endboth ends are slightly positiveneither end is positive
- 14. Multiple ChoiceWater droplets take a spherical shape (as pictured) because of ____________adhesioncohesioncapillary actionsolubility
- 15. Multiple ChoiceThe 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.
- 16. Multiple ChoiceWater beads up on the surface of a penny because of this property.AdhesionHigh Surface TensionUniversal SolventChanges in Density
- 17. Multiple ChoiceMost of water's properties occur because it is...A polar covalentMade with oxygenA polar ionicMakes up 75% of the Earth
- 18. Multiple ChoiceWhat is the reason why oil and water don't mix?Oil is too heavy to mix with waterWater can only mix with polar moleculesWater can only mix with non-polar moleculesOil is too light to mix with water
- 19. Multiple ChoiceWhich of the following is LEAST likely to dissolve in water?nonpolar fats and oilspolar sugar moleculessalt made of a positive sodium ion and a negative chloride ionall of the substances will dissolve easily in water
- 20. Multiple ChoiceA water strider can skate along the top of a pond because:covalent bonds result in water cohesionhydrogen bonds result in water cohesion (surface tension)water striders have adapted to take advantage of water cohesionlow surface tension of water
- 21. Multiple ChoiceWhich characteristic of water will allow a paperclip to remain floating on water when the paperclip is gently placed on top of the water?adhesionsurface tensionsolvent propertiesnonpolar
- 22. Multiple ChoiceWhich property of water will cause water to bead up on glass?AdhesionCohesionAbility to dissolve substancesHigh specific heat
- 23. Multiple ChoiceWhat type of bond is between two water molecules?Covalent bondIonic bondHydrogen bondNonpolar bond
- 24. Multiple ChoiceWhich of the following is the correct explanation for water being polar?The equal sharing of electrons between oxygen and hydrogen atomsThe unequal sharing of electrons between oxygen and hydrogensThe equal sharing of protons between oxygen and hydrogensThe unequal sharing of protons between oxygen and hydrogens
- 25. Multiple ChoicePlant roots are able to absorb water because of ....evaporationcapillary actionsurface tensionuniversal solvent
- 26. Multiple ChoiceWater molecules act like MAGNETS because of this property...capillary actionsurface tensionpolar moleculenormal molecule
- 27. Multiple ChoiceThe test tube on the left has a meniscus which represents the way that this chemical would form a meniscuswatermercuryoxygenneon
- 28. Multiple ChoiceA water molecule is a ________ molecule, which has one oxygen that has a __________ charge and two hydrogens that have a ___________ charge.nonpolar, positive, negativepolar, positive, negativepolar, negative, positivenonpolar, negative, positive
- 29. Multiple ChoiceWhich of the following characteristics of water is not a result of hydrogen bonding?adhesive strengthcapillaritycohesive strengthAll of the above are a result of hydrogen bonding.
- 30. Multiple ChoiceHow many atoms make up a molecule of water?1234
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