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- 1. Multiple Choice
What two elements make up water?Helium and oxygenHydrogen and oxygenhelium and carbonoxygen and carbon - 2. Multiple ChoiceWhat word describes when water is attracted to other substances?cohesionadhesioncapillary actionsurface tension
- 3. 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.
- 4. Multiple ChoiceWhich end of the water molecule has a slightly positive charge?the oxygen endthe hydrogen endboth ends are slightly positiveneither end is positive
- 5. Multiple ChoiceWater is a universal solvent because it...It can be found anywhereIt freezes when it gets coldfloats when frozenDissolves most substances
- 6. 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.
- 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 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
- 9. Multiple ChoiceThe tightness across the surface of water that enables paper clips to float is ____________.adhesioncapillary actionsurface tensionpolarity
- 10. 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
- 11. Multiple ChoiceWhen a molecule has an opposite electrical charge on each end, it is known as what?cohesionpolar moleculehydrogen bondsolution
- 12. Multiple ChoiceWhen water molecules stick easily to other water molecules, this is called what?cohesionadhesionsolutionpolar molecule
- 13. Multiple Choice
The ability of water molecules to stick to each other, creating surface tension is called:
Cohesion
Adhesion
Insulation
Ph
- 14. Multiple Choice
What property of water results in the accumulation of small amounts of water into larger amounts of water? The results in the rivers, lakes, streams, and even the oceans.
Cohesive Behavior
Expansion Upon Freezing
Ability to Moderate Temperature
Universal Solvent
- 15. Multiple Choice
What property of water allows for water to act as a temperature regulator for the world?
Cohesive Behavior
Expansion Upon Freezing
High Specific Heat
Universal Solvent
- 16. Multiple Choice
What property of water causes these Alka-Seltzer tablets to dissolve?
Universal Solvent
Expansion Upon Freezing
Cohesive Behavior
High Specific Heat
- 17. Multiple Choice
Sweating is an example of what property of water?
Ability to Moderate Temperature
Expansion Upon Freezing
Cohesive Behavior
Universal Solvent
- 18. Multiple Choice
Why does water move from the roots to the leaves of plants?
Water is pushed by solutes
Water is pulled by gravity
Capillary action pulls the water molecules like a chain
Water's cohesion causes it to "pull" towards the leaves
- 19. Multiple Choice
Why 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
- 20. Multiple Choice
Water has an unusually high specific heat. What does this mean?
At its boiling point, water changes from liquid to vapor.
A large amount of heat is required to raise the temperature of water.
Ice floats in liquid water.
Salt water freezes at a lower temperature than pure water.
Floating ice can insulate bodies of water.
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