Explain what determines the number of hours in a day and the number of days in a year on the Earth. At least 4 sentences.

Question

Explain what determines the number of hours in a day and the number of days in a year on the Earth.  At least 4 sentences.

anonymous · Answer

@jtstrumpf

anonymous · Answer

I know what makes a year, but not what makes a day. Is it the sun's sunlight?

anonymous · Answer

Days in a year is determined by how long it takes for the earth to complete one full revolution. A day is measured by the earth rotating on its own axis in one complete rotation. Our rotating is what creates the illusion of the sun setting and rising, so it is easy to track a day as the apparent sunrise to sunrise time.

anonymous · Answer

*first sentence should finish with revolution around the sun.

anonymous · Answer

Thanks! And that's actually better than what I would say XD

hyroko · Answer

The number of hours in the day was arbitrarily chosen as how to split up the amount of time ( a mere concept of movement) that it takes for the Earth to revolve once upon its axis. 

A year is supposed to be the amount of time that it takes the Earth to revolve around the sun, but this is actually inaccurate. It actually takes approximately 365.25 days for the Earth to make a full trip around the sun, hence why we have "leap" years every 4 years, not to mention the entire purpose of Daylight savings time.

anonymous · Answer

https://www.youtube.com/watch?v=xX96xng7sAE Here is an excellent and entertaining video on this subject!