Why does ice float on water? a. Ice is hydrophobic and repels ...

[Mollykgkg]

Why does ice float on water?
 
  a. Ice is hydrophobic and repels water.
  b. Water molecules have less mass the colder they get.
  c. Water molecules are spaced farther apart in ice than in liquid water.
  d. Vibrating electrons in liquid water push ice to the surface.
  e. Hydrogen bonds are weaker in ice.

Question 2

How rapidly a planet loses its atmosphere depends on the planet's I. escape velocity (determined by mass and radius). II. atmospheric composition. III. temperature. IV. rotation period.
 
  a. I & II
  b. III & IV
  c. I, II, & III
  d. II, III, & IV
  e. I, II, III, & IV

[sylvia]

Answer to Question 1

c

Answer to Question 2

c

[Mollykgkg]

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