OCE chap 5 Questions with Correct Answers (Grade A+)
Question 1: bonds that hold adjacent water molecules together
Answer: hydrogen bonds
Question 2: negatively charged subatomic particles that orbit an atomic nucleus
Answer: electrons
Question 3: basic building blocks of all matter
Answer: atoms
Question 4: bonds that involve the sharing of electrons between atoms
Answer: covalent bonds
Question 5: charged atoms due to the gain or loss of one or more electrons
Answer: ions
Question 6: Hydrogen bonds form between neighboring water molecules because of:
Answer: the polarity of water molecules
Question 7: If you were an explorer stranded in the Arctic Ocean, what method(s) could you use for
creating fresh drinking water? Choose all that apply.
Answer: -Heat sea ice that formed a long time ago. -Boil seawater; catch and condense the water vapor.
-Catch and melt fresh falling snow.
Question 8: Which of the following methods cannot be used to desalinate water? Which of the following
methods cannot be used to desalinate water? Electrolysis Osmosis Freeze separation Reverse osmosis
Distillation
Answer: Osmosis
Question 9: Which of the following best describes the Distillation Method for desalination?
Answer: Saltwater is boiled and the water vapor is passed through a cooling condenser, where it condenses
as freshwater.
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, Question 10: Which of the following best describes the Electrolysis Method for desalination?
Answer: A current is run through positive and negative electrodes in freshwater separated by
semipermeable membranes from seawater.
Question 11: Which of the following best describes the Reverse Osmosis Method for desalination?
Answer: Water on the salty side of a semipermeable membrane is pushed under high pressure through the
membrane to the freshwater side.
Question 12: Which of the following best describes the Freeze Separation Method for desalination?
Answer: Seawater is frozen and thawed multiple times, with the salts washed from the ice between each
thawing.
Question 13: The primary difficulty that must be overcome in the use of desalination plants to provide
fresh water is __________.
Answer: the high cost of energy involved
Question 14: change in state from solid to gas
Answer: sublimation
Question 15: change in state from gas to liquid
Answer: condensation
Question 16: change in state from liquid to gas
Answer: evaporation
Question 17: area of rapid change in density with slight change in depth
Answer: pycnocline
Question 18: area of rapid change in salinity with slight change in depth
Answer: halocline
Question 19: A rapid change in ocean temperature with a change in depth occurs in the:
Answer: thermocline
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Question 1: bonds that hold adjacent water molecules together
Answer: hydrogen bonds
Question 2: negatively charged subatomic particles that orbit an atomic nucleus
Answer: electrons
Question 3: basic building blocks of all matter
Answer: atoms
Question 4: bonds that involve the sharing of electrons between atoms
Answer: covalent bonds
Question 5: charged atoms due to the gain or loss of one or more electrons
Answer: ions
Question 6: Hydrogen bonds form between neighboring water molecules because of:
Answer: the polarity of water molecules
Question 7: If you were an explorer stranded in the Arctic Ocean, what method(s) could you use for
creating fresh drinking water? Choose all that apply.
Answer: -Heat sea ice that formed a long time ago. -Boil seawater; catch and condense the water vapor.
-Catch and melt fresh falling snow.
Question 8: Which of the following methods cannot be used to desalinate water? Which of the following
methods cannot be used to desalinate water? Electrolysis Osmosis Freeze separation Reverse osmosis
Distillation
Answer: Osmosis
Question 9: Which of the following best describes the Distillation Method for desalination?
Answer: Saltwater is boiled and the water vapor is passed through a cooling condenser, where it condenses
as freshwater.
Page 1
, Question 10: Which of the following best describes the Electrolysis Method for desalination?
Answer: A current is run through positive and negative electrodes in freshwater separated by
semipermeable membranes from seawater.
Question 11: Which of the following best describes the Reverse Osmosis Method for desalination?
Answer: Water on the salty side of a semipermeable membrane is pushed under high pressure through the
membrane to the freshwater side.
Question 12: Which of the following best describes the Freeze Separation Method for desalination?
Answer: Seawater is frozen and thawed multiple times, with the salts washed from the ice between each
thawing.
Question 13: The primary difficulty that must be overcome in the use of desalination plants to provide
fresh water is __________.
Answer: the high cost of energy involved
Question 14: change in state from solid to gas
Answer: sublimation
Question 15: change in state from gas to liquid
Answer: condensation
Question 16: change in state from liquid to gas
Answer: evaporation
Question 17: area of rapid change in density with slight change in depth
Answer: pycnocline
Question 18: area of rapid change in salinity with slight change in depth
Answer: halocline
Question 19: A rapid change in ocean temperature with a change in depth occurs in the:
Answer: thermocline
Page 2
