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- 1. Multiple ChoiceWhat two elements make up water?Helium and oxygenHydrogen and oxygenhelium and carbonoxygen and carbon
- 2. 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
- 3. Multiple ChoiceWhat word describes when water is attracted to other substances?cohesionadhesioncapillary actionsurface tension
- 4. Multiple ChoiceThe weak attractions between water molecules are calledCovalent bondsIonic bondsPolar bondsHydrogen bonds
- 5. Multiple ChoiceWater’s attraction to other water moleculesadhesioncapillary actioncohesionsurface tension
- 6. 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.
- 7. 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.
- 8. Multiple ChoiceTendency of molecules of the same kind to stick to one anothercohesionadhesionsolutionpolar molecule
- 9. Multiple ChoiceMolecule in which opposite ends have opposite electric chargescohesionpolar moleculehydrogen bondsolution
- 10. Multiple ChoiceWater is known as the universal solvent.TrueFalse
- 11. Multiple ChoiceWhich end of the water molecule has a slightly positive charge?the oxygen endthe hydrogen endboth ends are slightly positiveneither end is positive
- 12. 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
- 13. Multiple Choice
Which 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 - 14. Multiple ChoiceWhich part(s) of a water molecule has/have a partial negative charge?the two hydrogen (H) atomsthe two oxygen (O) atomsthe one hydrogen (H) atomthe one oxygen (O) atom
- 15. Multiple ChoiceWhich types of compounds dissolve easily in water?Polar and NonpolarPolar and IonicNonpolar and IonicCovalent and Nonpolar
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