GEG 111 Harper Exam Two Questions With Correct Answers.

GEG 111 Harper Exam Two Questions With Correct
Answers

Properties |of |water |- |CORRECT |ANSWER✔✔-• |Exists |as |a |liquid |at |most |places |on |Earth's |
surface

• |Expands |when |it |freezes; |which |is |important |in |the |weathering |of |rock

• |Hydrogen |bonding |creates |surface |tension, |a |"skin" |of |molecules |giving |water |a |stickiness

quality |- |surface |tension

• |Capillarity; |water |can |"climb" |up |narrow |openings. |This |is |important |to |the |movement |of

groundwater.

• |Good |solvent; |water |dissolves |most |substances

• |High |specific |heat; |it |takes |a |relatively |high |amount |of |energy |to |raise |the |temperature |of

water.



Phase |Changes |and |Heat |Exchange |- |CORRECT |ANSWER✔✔-Water |absorbs |or |releases |energy |
as |it |changes |from |one |state |to |another.

• |IMPORTANT: |The |heat |exchanged |between |physical |states |of |water |provides |more |than

30% |of |the |energy |that |powers |the |general |circulation |of |the |atmosphere.



Latent |Heat |- |CORRECT |ANSWER✔✔-The |heat |energy |absorbed |or |released |during |a |phase |
change.



Three |phases |of |water |- |CORRECT |ANSWER✔✔-1) |Ice: |solid |phase

2)Water: |liquid |phase

3)Water |Vapor: |gas |phase

, Ice, |the |solid |phase |- |CORRECT |ANSWER✔✔-• |Upon |freezing |water |expands |in |volume |and |
density |(Note: |maximum |density |occurs

while |water |is |still |in |a |liquid |phase, |at |4°C |(39°F)

• |The |decrease |in |density |manifests |itself |in |the |buoyancy |of |ice |in |water

• |The |increase |in |volume |can |damage |infrastructure |e.g. |roads, |pipes |and |plays |an

important |role |in |the |weathering |(breakdown) |of |rocks



Water, |the |liquid |phase |- |CORRECT |ANSWER✔✔-Non-compressible |fluid |that |assumes |the |
shape |of |its |container

• |The |phase |change |from |ice |absorbs |heat |energy

• |A |good |solvent



Water |vapor, |the |gas |phase |- |CORRECT |ANSWER✔✔-• |Invisible |and |compressible |gas

• |We |see |water |vapor |in |the |atmosphere |after |condensation |has |occurred |in |the |form

of |clouds, |fog, |and |steam

• |Water |vapor |is |a |greenhouse |gas



Humidity |- |CORRECT |ANSWER✔✔-Humidity |is |the |amount |of |water |vapor |in |the |air

• |The |water |holding |capacity |of |air |is |influenced |by |temperature |of |the |air |and |water |vapor

• |Humidity |and |air |temperature |determine |our |sense |of |comfort



Relative |humidity |- |CORRECT |ANSWER✔✔-A |measure |of |how |close |the |air |is |to |saturation |(% |
saturation) |at |a |given |temperature |or |the |ratio |of |the |amount |of |water |vapor |is |in |the |air |
compared |to |the |maximum |amount |of |water |vapor |that |the |air |can |hold |at |a |given |
temperature

• |Because |there |is |a |maximum |amount |of |water |vapor |that |can |exist |in |a |volume |of |air |at |a

given |temperature, |the |rates |of |evaporation |and |condensation |can |reach |equilibrium |at

some |point.