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- 1. Multiple Choice
What word describes when water is attracted to other substances?cohesionadhesioncapillary actionsurface tension - 2. Multiple ChoiceAttractions between water molecules are calledCovalent bondsIonic bondsPolar bondsHydrogen bonds
- 3. 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.
- 4. 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.
- 5. Multiple ChoiceWhich end of the water molecule has a slightly positive charge?the oxygen endthe hydrogen endboth ends are slightly positiveneither end is positive
- 6. Multiple ChoiceWater is a universal solvent because it...It can be found anywhereIt freezes when it gets coldfloats when frozenDissolves most substances
- 7. Multiple ChoiceWhich types of compounds dissolve easily in water?Polar and NonpolarPolar and IonicNonpolar and IonicCovalent and Nonpolar
- 8. Multiple ChoiceWhat property of water helps to moderate earth's temperature?adhesionchohesionSpecific heat capacityLatent heat of vaporization
- 9. Multiple Choice
What is the chemical formula of water?
H2O
H202
HO
- 10. Multiple Choice
What is surface tension?
an elastic film on the surface of the water caused by hydrogen bonds
an elastic band that holds all the water together
the tightness at the bottom of the water
an elastic film on the surface
- 11. Multiple Choice
Due to its polarity, water doesn't mix with ____________ substances like _____________.
polar; oil
polar; salts
Non-polar; oil
Non-polar; salts
- 12. 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
- 13. Multiple Choice
What is the correct chemical formula for water?
H2O
HO2
H2O2
2H1O
- 14. Multiple Choice
Which of the following is an example of COHESION?
water sticking to water
water sticking to glass
oil sticking to plastic
hydrogen sticking to oxygen
- 15. Multiple Choice
Water is polar. What does that mean?
it is a molecule with opposite charges on opposite ends
it is a molecule with no charge
it is a molecule with identical charges on opposite ends
it is a molecule with too many protons
- 16. Multiple Choice
Water sticks well to many materials. What term relates to this property of water?
cohesion
adhesion
density
surface tension
- 17. Multiple Choice
What is the term for water's ability to defy gravity and climb up a tube?
Capillary Action
Specific Heat
Universal Solvent
Magic
- 18. Multiple Choice
Why does ice float?
water expands when it freezes, making ice less dense than water
water compacts when it freezes, making ice more dense than water
hydrogen bonds in water push the ice to the surface
ice is afraid of water, and avoids it
- 19. Multiple Choicemolecule in which opposite ends have opposite electric chargescohesionpolar moleculehydrogen bondsolution
- 20. Multiple ChoiceWater is a universal solvent because it...It can be found anywhereIt freezes when it gets coldfloats when frozenDissolves most substances
- 21. Multiple ChoiceWhich 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
- 22. Multiple Choice
Which of the following is the correct molecular structure for water, H2O?
- 23. Multiple ChoiceLarge bodies of water do not quickly fluctuate in temperature. Why?Water is a solvent.Water has a high heat capacity.Water acts as a buffer.Water is non-polar.
- 24. Multiple Choice
Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?
The insects are light enough so they do not break the hydrogen bonds holding the water molecules together
The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.
The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.
The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
- 25. 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.
- 26. Multiple Choice
Which part of a water molecule has a Positive Charge?
The Hydrogen
The Oxygen
The Top
The Bottom
- 27. Multiple Choice
Which part of a water molecule has a Negative Charge?
The Hydrogen
The Oxygen
The Left
The Right
- 28. Multiple Choice
Which of the following can water NOT dissolve?
Salt
Sugar
Oil
Baking Soda
- 29. Multiple Choice
Which of the following is the CORRECT list of water's properties?
Read Carefully!
adhesion, cohesion, high specific heat, universal solvent
adhesion, cohesion, low specific heat, universal solvent
adhesion, no cohesion, low specific heat, universal solute
no adhesion, cohesion, high specific heat, universal solute
- 30. Multiple Choice
You body sweats to help prevent you from overheating. How does water regulate temperature?
it lets heat pass through it
it absorbs a lot of heat, then decreases in temperature
it absorbs a lot of heat, but only increases a little in temperature
heat is afraid of water and avoids it
- 31. Multiple Choice
Water is polar. What does that mean?
it is a molecule with opposite charges on opposite ends
it is a molecule with no charge
it is a molecule with identical charges on opposite ends
it is a molecule with too many protons
- 32. Multiple Choice
Water sticks well to many materials. What term relates to this property of water?
cohesion
adhesion
density
surface tension
- 33. Multiple ChoiceWhy can water have no net charge but have slight charges in different parts of the 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 ends change in polarityBecause it is hydrophobic
- 34. 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
- 35. 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
- 36. Multiple ChoiceWhy does water move from the roots to the leaves of plants?Water is pushed by solutesCapillary action pulls the water molecules like a chainWater is pulled by gravityWater’s cohesion causes it to “pull” towards the leaves
- 37. Multiple ChoiceWhich property of water will cause water to bead up on glass?AdhesionCohesionAbility to dissolve substancesHigh specific heat
- 38. 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.
- 39. 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
- 40. 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
- 41. 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
- 42. Multiple Choice
The tightness across the surface of water that enables paper clips to float called .....
adhesion
capillary action
surface tension
polarity
- 43. 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.
- 44. 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.
- 45. 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.
- 46. Multiple Choice
Water heats up slowly because it has
cohesion
polarity
high specific heat
low specific heat
- 47. Multiple Choice
Water forms droplets because of
adhesion
cohesion
capillary action
universal solvent
- 48. Multiple Choice
Water moves up to the top of plants because of
cohesion
adhesion
capillary action
specific heat
blood vessels
- 49. Multiple Choice
Which best describes adhesion?
movement of water up a straw
attraction between similar molecules
attraction between different molecules
positive and negative charges
- 50. Multiple Choice
Which property explains why water molecules have cohesion?
surface tension
capillary action
polarity
adhesion
- 51. Multiple Choice
Water soaks through a paper towel due to
capillary action
surface tenstion
polarity
density
- 52. Multiple Choice
Sugar, salt, and baking soda dissolve in water because water is the
best substance
universal solute
universal solvent
magic potion
- 53. Multiple Choice
The useful properties of water arise from its structure.
True
False
- 54. Multiple Choice
Why do water molecules attach to one another?
Because of the slightly positive regions and slightly negative regions
Due to the positive regions attracting other positive regions
Due to the negative regions attracting other negative regions
None of the above
- 55. Multiple Choice
Refer to the picture of water sticking to a leaf; this is occurring because of:
Adhesion
Cohesion
- 56. Multiple Choice
Refer to the picture; the water strider can walk over waters surface. This is occurring due to:
Adhesion
Cohesion
- 57. Multiple ChoiceRefer to the picture; this is occurring because of:AdhesionCohesion
- 58. Multiple Choice
Water is a liquid at room temperature, and this
is one of its many unique properties
is not important
prevents it from cycling from the abiotic to biotic forms in an ecosystem
- 59. Multiple Choice
Refer to the photo. Which below best describes what is happening in the photo?
Water is acting as the universal solve thanks to COHESION
Water is adhesively hydrogen bonding to salt molecules
Water is being a liquid at room temperature
A meniscus is forming due to adhesion
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