Every planet rotates at the same speed
False
On Neptune, one day lasts 16 hours, 6 minutes
False
True
Every planet has 24 hours in a day
True
False
The length of a day depends on how big a planet is.
False (the size of a planet has nothing to do with how long its days are)
Mercury has the shortest day
False (a day on Mercury last over 58 Earth days)
A day on Venus is longer than a year on Earth
False (a day on Venus is 116 days, which is long, but not as long as a year on Earth)
Jupiter has longest day
False (Jupiter has the shortest day at just under 10 hours)
The length of day depends on how fast a planet rotates.
True
Uranus has the second shortest day
False (Saturn has the second shortest day)
Jupiter has the shortest day
True (Despite being the biggest planet, Jupiter's day is just 9 hours, 56 minutes long)
Mercury rotates roughly twice as fast as Venus
True (a day on Mercury is about 58 Earth days and on Venus it's 116 days, meaning Mercury rotates twice as fast)
A day on Uranus last 17 hours, 14 minutes
True
The length of a day depends on how far a planet is from the Sun
True
False
A day on Mars is the same as a day on Earth
False (a day on Mars is 37 minutes longer than on Earth)
Earth has the shortest day
True
False
The length of a day depends on how fast a planet goes round the Sun.
True
False
Mercury has the second longest day
True
False
On Earth a day last 24 hours
Fast
True
On Mars, a day last 1 day and 35 minutes
False (sorry... it lasts 1 day and 37 minutes)