Even when the temperature of a pan of water is less than the boiling point, water still evaporates. This is because a. the speeds of individual molecules varies
b. conservation of energy
c. of convection
d. radiation

a polar bond is formed when electrons are shared unevenly between atoms

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.