How long does the earth take to travel around the sun?
365.X days, I don't know X, but is less than 5 for sure
How much of the Earth's surface is covered in water?
something about 3/4
How much of it is fresh water?
maybe 1/10 or less ... just guessing
Did humans and dinosaurs live on the Earth at the same time?
Technically not. But i.e. birds are sometimes considered as dinosaur descendants, so who knows
Is evolution still happening?
yes