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- 1. Multiple Choice
What 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:specific heatsurface tensionadhesioncapillary action
- 3. Multiple ChoiceWhat word describes when water is attracted to other substances?cohesionadhesioncapillary actionsurface tension
- 4. Multiple ChoiceWhy is water considered a polar 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 are covalently bondedBecause it is hydrophobic
- 5. Multiple ChoiceWhy does water move from the roots to the leaves of plants?Water is pushed by solutesCapillary action pulls the water molecules upWater is pulled by gravityWater’s cohesion causes it to “pull” towards the leaves
- 6. Multiple ChoiceAttractions between water molecules are calledCovalent bondsIonic bondsPolar bondsHydrogen bonds
- 7. 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
- 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 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.
- 11. Multiple ChoiceWhat word describes when a water sticks to another substance?CohesionAdhesionSolutionTranspiration
- 12. Multiple ChoiceWhen you mix salad oil and water they immediately separate because:Water does not dissolve oilHydrogen bonds form between water moleculesSalad oil is too denseIt depends on what kind of oil you are using
- 13. 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.
- 14. Multiple ChoiceIf you put a fine mesh screen under a bottle of water the water will not pour out. Why?The mesh is too small for water to flow throughThe square shapes of the mesh do not fit water drops.The surface tension of the water holds the water molecules together.It's magic. Sorcery!
- 15. Multiple ChoiceWater is polar because...It has a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.The molecule has two poles, one that is colder than the other.It is a favorite drink for polar bears.The water molecule is neutral.
- 16. Multiple ChoiceWater can move UP paper, against gravity, due to ______________.capilary actioncapital actioncohesion actioncoronary action
- 17. Multiple ChoiceWater is the only substance on Earth that naturally exists in _______________.Solid and liquid statesAll three statesGaseous formLiquid and gas states
- 18. Multiple ChoiceHow are adhesion and cohesion similar?Both are water moleculesBoth need to bondBoth have propertiesBoth are about sticking to something
- 19. Multiple ChoiceIce freezes at the top of a pond and protects the water life underneath. What property of water is KEY in this situation?capillary actionice is less dense than watersurface tensionwater is a polar molecule
- 20. Multiple ChoiceBecause of specific heat what warms up faster?LandWater
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