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- 1. Multiple Choice
A insect like a water strider can skate along the top of a pond because:
covalent bonds result in water cohesion
hydrogen bonds result in water cohesion (surface tension)
low surface tension of water
- 2. Multiple ChoiceWhat word describes when water is attracted to other substances?cohesionadhesioncapillary actionsurface tension
- 3. Multiple ChoiceAttractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are calledCovalent bondsIonic bondsPolar bondsHydrogen bonds
- 4. Multiple ChoiceLarge bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?Water is an acid.Water is a versatile solvent.Water has a high heat capacity.Water acts as a buffer.
- 5. Multiple ChoiceWater is essential for life. Its special properties make water the single most important molecule in plant life. Which 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 is able to moderate temperature.
- 6. Multiple ChoiceWhy does ice stay at the top of oceans instead of sinking to the bottom?Ice is colder than liquid water.Ice is less dense than liquid water.Ice is more dense than liquid water.Ice is warmer than liquid water.
- 7. Multiple ChoiceSmall insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?The insects are light enough so that 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 feetThe insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surfaceThe insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
- 8. Multiple ChoiceWater makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature?Water is a good solvent.Water exhibits strong cohesion.. Water has an unusual crystalline structure.Water has a high capacity for heat.
- 9. Multiple ChoiceWhat two elements make up water?Helium and oxygenHydrogen and oxygenhelium and carbonoxygen and carbon
- 10. Multiple ChoiceThe fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid formless polarmore polarless densemore dense
- 11. Multiple ChoiceThe tightness across the surface of water that enables paper clips to float is ____________.adhesioncapillary actionsurface tensionpolarity
- 12. Multiple ChoiceWhich statement explains why water molecules stick together?both sides are negativeone side has a positive charge and the other side has a negative chargeone side has a negative charge adn the other side has a neutral chargeboth sides are positive
- 13. Multiple ChoiceWhat is water?An atomA molecule composed of 2 parts Oxygen and one part HydrogenA molecular compound composed of 2 parts Hydrogen and one part OxygenA pure substance composed of 2 parts Hydrogen and one part Oxygen
- 14. Multiple ChoiceWhat is adhesion?Water's ability to stick to itselfWater's ability to stick to other substancesThe strength of the cohesion of all the water molecules combinedTape, glue and other adhesives
- 15. Multiple ChoiceWhat is cohesion?Water's ability to stick to itselfWater's ability to stick to other substancesThe strength of the cohesion of all the water molecules combinedTape, glue and other adhesives
- 16. Multiple Choicemolecule in which opposite ends have opposite electric chargescohesionpolar moleculehydrogen bondsolution
- 17. Multiple ChoiceWater is a universal solvent because it...It can be found anywhereIt freezes when it gets coldfloats when frozenDissolves most substances
- 18. Multiple ChoiceWhich term refers to water having partial positive and a partial negative charge?cohesionsurface tensionpolarityadhesion
- 19. Multiple ChoiceA high specific heat means...It heats up quickly with energy addedIt requires more energy to change temperature
- 20. Multiple Choice
Capillary Action
The property of water that allows ice to float on the surface of liquid water
The property of water that allows it to dissolve polar substances
When water molecules stick to other surfaces
The property of water that allows water to move up a thin tube (or the stem of a plant) by itself
- 21. Multiple Choice
What property of water allows water to flow against gravity?
Polarity
Cohesion
Capillary Action
Adhesion
- 22. 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
- 23. Multiple ChoiceWhen water molecules stick easily to other water molecules, this is called what?cohesionadhesionsolutionpolar molecule
- 24. Multiple Choice
What type of charge does an electron have?
positiveno chargenegativeneutral - 25. Multiple ChoiceA proton is a _____ charged particle.NegativelyPositively
- 26. Multiple Choice
Water is a polar molecule. Which portion of water has a negative charge?
the hydrogens
the oxygen
both
neither
- 27. Multiple Choice
Which portion of a water molecule has a positive charge?
none of it
the hydrogens
the oxygen
all of it
- 28. Multiple Choice
What property explains why sweating cools you down?
Water is a good solvent.
Water expands when it freezes.
Water has a high heat of vaporization.
Capillary action
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