ESE 320 Exam 1 with all Correct & 100% Verified Answers
|Actual Complete Update |Guaranteed to Pass
The key characteristic of water that results in the oceans regulating the temperature on earth is
____. ✔Correct Answer-high heat of vaporization & high heat capacity
The property of water that results in the ability of a water bug to "skate" along the surface is
_____. ✔Correct Answer-surface tension
Hydrogen bonding between water molecules occurs between 2 hydrogen atoms. ✔Correct
Answer-False
The reason that water does not dissolve oil is that _______. ✔Correct Answer-water
molecules are polar and oil molecules are not, therefore they are not attracted to each other
If the Earth were much smaller and much closer to the sun, the Earth's surface would be
entirely covered by liquid water. ✔Correct Answer-False
What is meant by the boiling point temperature of a liquid? Why is the boiling point of water
higher at sea level (100 o C) than at the top of Mt. Everest (68 o C) ✔Correct Answer-The
boiling point is the temperature at which the vapor pressure of the liquid equals the
atmospheric pressure surrounding the liquid. (2 pts) (you needed to mention something about
the vapor pressure of the liquid being equal to the air pressure surrounding the liquid)
The air pressure decreases with elevation. Lower pressure = lower boiling point.
At what temperature does water reach its maximum density? Why is this property so unusual?
Why is this property so important for freshwater aquatic life during winter months in cold
areas? ✔Correct Answer-At about 4 o C.
Most substances are at maximum density in a solid phase.
Lakes would freeze from the bottom up killing aquatic life.
Describe what is meant by surface tension in a liquid. Why does water have a relatively high
surface tension? Why is this high surface tension important for vascular plants? ✔Correct
Answer-Surface tension is a property of the surface of a liquid that allows it to resist an external
force.
Hydrogen bonds lead to strong attractive forces between molecules of water, giving rise to
water's high surface tension and capillary forces.
The capillary forces allow water to move up a narrow tube against the force of gravity. This
property is relied upon by all vascular plants, such as trees.
|Actual Complete Update |Guaranteed to Pass
The key characteristic of water that results in the oceans regulating the temperature on earth is
____. ✔Correct Answer-high heat of vaporization & high heat capacity
The property of water that results in the ability of a water bug to "skate" along the surface is
_____. ✔Correct Answer-surface tension
Hydrogen bonding between water molecules occurs between 2 hydrogen atoms. ✔Correct
Answer-False
The reason that water does not dissolve oil is that _______. ✔Correct Answer-water
molecules are polar and oil molecules are not, therefore they are not attracted to each other
If the Earth were much smaller and much closer to the sun, the Earth's surface would be
entirely covered by liquid water. ✔Correct Answer-False
What is meant by the boiling point temperature of a liquid? Why is the boiling point of water
higher at sea level (100 o C) than at the top of Mt. Everest (68 o C) ✔Correct Answer-The
boiling point is the temperature at which the vapor pressure of the liquid equals the
atmospheric pressure surrounding the liquid. (2 pts) (you needed to mention something about
the vapor pressure of the liquid being equal to the air pressure surrounding the liquid)
The air pressure decreases with elevation. Lower pressure = lower boiling point.
At what temperature does water reach its maximum density? Why is this property so unusual?
Why is this property so important for freshwater aquatic life during winter months in cold
areas? ✔Correct Answer-At about 4 o C.
Most substances are at maximum density in a solid phase.
Lakes would freeze from the bottom up killing aquatic life.
Describe what is meant by surface tension in a liquid. Why does water have a relatively high
surface tension? Why is this high surface tension important for vascular plants? ✔Correct
Answer-Surface tension is a property of the surface of a liquid that allows it to resist an external
force.
Hydrogen bonds lead to strong attractive forces between molecules of water, giving rise to
water's high surface tension and capillary forces.
The capillary forces allow water to move up a narrow tube against the force of gravity. This
property is relied upon by all vascular plants, such as trees.
