Question

Which planet has a year of 687 days, a day of 24 hours 37 minutes, a diameter twice that of the moon and a mass one tenth of the earth?

Answer 1

A year on Mars is 687 Earth days. You may have noticed by now that the length of the planet's year increases the further the planet is from the Sun, which is only common sense because the further out planets have to make a bigger orbit around the Sun