What describes a phase change

If a planet rotates 360 degrees during a 24 hour time period, what does that tell us about the planet? a. the middle of the planet is in darkness b. the seasons on the planet vary every day. c. the planet runs on a 12-hour time clock. d. the temperature on the planet varies daily.

Motivation cannot be developed with practice; a person either possesses it or they do not.

How manyatoms of mercury are in 1.4214e+1 ml sample