Mars ?
Its diameter is less than
one-half the length of
Earth's diameter.
Mercury
?
Its atmosphere contains
thick clouds of sulfuric
gas.
Earth
?
Its atmosphere is mostly
nitrogen.
Venus
?
It experiences large dust
storms.

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Based on its chemical properties, identify the position of each chemical family on the periodic table.

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d