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- 1. Multiple Choice
In a water molecule ________________ has the positive charge.
Hydrogen
Oxygen
Nitrogen
Helium
- 2. Multiple Choice
In a water molecule _____________ has the negative charge.
Hydrogen
Oxygen
Nitrogen
Helium
- 3. Multiple Choice
Some insects and small organisms can walk on water due to
Adhesion
Capillary Action
Surface Tension
Specific heat
- 4. Multiple Choice
The tendency of water molecules to attract to one another is known as
Adhesion
Cohesion
Specific heat
Capillary Action
- 5. Multiple Choice
The _____________ is the part of the solution that is dissolved.
Smaller molecule
Larger molecule
Solute
Solvent
- 6. Multiple Choice
The ______________ is the part of the solution that dissolves the other substance.
Large molecule
small molecule
Solvent
Solute
- 7. Multiple Choice
The ________________ is the amount of heat it takes to raise the temperature of one gram of a substance by one degree Celsius.
Heat of vaporization
Specific Heat
Capillary Action
Surface tension
- 8. Multiple Choice
Water molecules are strongly attracted to one another due to _______________ bonds, which causes ________________.
Hydrogen; Adhesion
Hydrogen; Cohesion
Ionic; Adhesion
Ionic; Cohesion
- 9. Multiple Choice
When water molecules bond to the xylem in plants, it is displaying the property of
Cohesion
Adhesion
Surface tension
Polarity
- 10. Multiple Choice
Ice floats on water because it ___________ when it freezes, and becomes __________ dense than water.
Contracts; more
Contracts; less
Expands; more
Expands; less
- 11. Multiple Choice
Water is able to dissolve _________ substances due to its ____________
Polar; Polarity
Non-polar; Polarity
Polar; Non-polarity
Non-polar; Non-polarity
- 12. Multiple Choice
Due to its polarity, water doesn't mix with ____________ substances like _____________.
polar; oil
polar; salts
Non-polar; oil
Non-polar; salts
- 13. Multiple Choice
When a lake freezes over in the winter,
the ice only forms on the top layer and acts as insulation for the rest of the lake.
the ice freezes the entire lake into one giant ice cube.
the ice freezes on the top layer, but then sinks to the bottom because ice is more dense than water.
the ice only forms on the bottom layer, and melts quickly.
- 14. Multiple Choice
Large bodies of water tend to resist large temperature changes due to water's __________________ which allow it to
heat of vaporization; store cold air
heat of vaporization; keep the water from evaporating
high specific heat; reflect heat
high specific heat; absorb and store heat.
- 15. Multiple Choice
Water appears to bulge out in a spherical droplet when ___________ is a large factor.
Adhesion
Capillary action
Cohesion
Density
- 16. Multiple Choice
When water is heated, the _________ bonds are broken, and water stops being so ____________.
Covalent; adhesive
Ionic; cohesive
Hydrogen; cohesive
Hydrogen; adhesive
- 17. Multiple Choice
When a water molecule clings to a wooden surface, and forms a flat sheet of water, it is displaying
Adhesion
Capillary action
Cohesion
Surface tension
- 18. Multiple Choice
When water moves up a piece of paper, or up a tree against gravity, it is displaying the property of water known as
Adhesion
Capillary action
Cohesion
Density
- 19. 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.
- 20. 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.
- 21. 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.
- 22. Multiple ChoiceWater is often called the "universal solvent" because many substances can be dissolved in water. What property of water allows it to be such a versatile solvent?puritypolarity and cohesionhigh heat capacityexpansion upon freezing
- 23. Multiple Choice
Small 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 - 24. Multiple ChoiceA florist places a bouquet of white carnations in water containing blue dye. After a time, the flowers turn blue. What process helped the carnations to change color?Specific heatSurface tensionCohesion and adhesion of water moleculesFormation of covalent bonds between hydrogen and oxygen molecules
- 25. 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.
- 26. Multiple ChoiceWater has a much higher specific heat than most other covalent compounds. What do you predict might happen if water had a low specific heat instead?Flooding would occur and animals would be forced to migrateHarmful organisms living in water would reproduce at a rapid rateOrganisms that are sensitive to changes in temperature would diePlants would not have enough water to effectively carry out photosynthesis
- 27. Multiple ChoiceMany fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect?Water absorbs heat when it evaporates and forms a gasWater expands and becomes less dense when it freezes.Water molecules completely separate into ions in solutions.Water forms hydrogen bonds with ions and other polar substances.
- 28. 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.
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