Because of the rotation of the Earth.
No, the length of day and night varies throughout the year due to the tilt of the Earth's axis as it orbits the sun. This results in the changing seasons and varying lengths of daylight and darkness.
The equator.
yes
It depends on your/their parents' genes. So, it varies in size.
A Year. Although the length of a year varies each year.
Surface conditions of the Earth vary depending on the exact location sampled. They vary from being quite hot and consistent throughout the year at the equator, with the length of each day being mostly consistent, to the extremes of cold and dryness at the poles, where day length varies greatly depending on the season.
Mean solar time
The length varies, but it is about 3 to 6 inches long.
At the equator, the length of day remains relatively constant throughout the year, with approximately 12 hours of daylight and 12 hours of darkness. This is due to the tilt of the Earth's axis in relation to the sun, resulting in consistent day length.
Day and night are of equal length at the equator, which is an imaginary line that circles the Earth halfway between the North and South Poles. This phenomenon occurs during the equinoxes, which happen around March 20-21 and September 22-23 each year.
The length of study for a CNA varies from program to program. The general length of full-time study is between six months to a year, and part time study takes about a year and a half.
The average length of the day is usually just called "day".