Part A) The tilt was caused by the combined momentum of all the fragments that came together to form the Earth. The most significant of which was probably the collision of the large planetoid that formed the moon.
Part B) 12 hours each, due to the fact that the Earth's axis is aligned with its orbit on the equinoxes.
The earth's axis is never aligned with the earth's orbit. It is inclined at about 67 degrees to the plane of the orbit, and this never changes.
The earth's axis has to point somewhere, and it happens to point towards some insignificant star which everybody therefore calls the pole star. This direction of the axis of spin does not change significantly over anyone's lifetime. At the equinoxes (= equal day and night) in March and September), this axis of the earth's spin lies exactly at right-angles to the line from sun to earth (the sun appears to be on the horizon all day at both poles, for the whole day). As the earth spins on those particular days, everywhere not at the poles sees the sun for exactly 12 hours.
Earth's hemispheres receive approximately the same amount of energy from the sun during the equinoxes, which occur around March 20th and September 22nd each year. At these times, the tilt of the Earth's axis causes the sun's rays to strike the Earth more directly at the equator, resulting in equal daylight and darkness across the globe.
The variation in periods of daylight and darkness at different latitudes throughout the year is primarily due to the tilt of the Earth's axis as it orbits the Sun. This tilt causes different latitudes to receive varying amounts of sunlight, leading to the changing lengths of days and nights. Closer to the poles, this effect becomes more pronounced, leading to periods of continuous daylight in summer and continuous darkness in winter.
The Earth rotates on its axis, which takes about 24 hours to complete one full rotation. As a result, different parts of the Earth receive sunlight at different times. When a specific location is facing the Sun, it experiences daylight, while the opposite side experiences darkness, creating day and night cycles.
Uneven heating of Earth's hemispheres results in differences in temperature and pressure, leading to the development of global wind patterns and ocean currents. This circulation helps to distribute heat more evenly around the planet, influencing weather patterns and climate.
Day and night are equal at the equinoxes, which occur twice a year (around March 20th and September 22nd). During the equinoxes, the Earth's axis is not tilted towards or away from the Sun, resulting in approximately equal amounts of daylight and darkness worldwide.
Earth's tilt causes different regions to receive different amounts of sunlight throughout the year. On March 20, the tilt is such that the hours of daylight and darkness are approximately equal in both hemispheres, marking the spring equinox. This occurs because the tilt aligns the equator with the center of the sun, resulting in equal distribution of sunlight.
The passage of the sun across the sky during daylight, and the stars circling round the axis during darkness.
Earth's hemispheres receive approximately the same amount of energy from the sun during the equinoxes, which occur around March 20th and September 22nd each year. At these times, the tilt of the Earth's axis causes the sun's rays to strike the Earth more directly at the equator, resulting in equal daylight and darkness across the globe.
The tilt of earths axis makes the equator appear to be sideways.
because they are different parts of the earths hemispheres.
The variation in periods of daylight and darkness at different latitudes throughout the year is primarily due to the tilt of the Earth's axis as it orbits the Sun. This tilt causes different latitudes to receive varying amounts of sunlight, leading to the changing lengths of days and nights. Closer to the poles, this effect becomes more pronounced, leading to periods of continuous daylight in summer and continuous darkness in winter.
11 hours
The north and eastern hemispheres
The Equinoxes - Autumnal and Vernal (or Spring). The hours of daylight equal the hours of darkness.
The Equator
Has to do with the earths tilt and whether you live in the northern or southern hemisphere.
the tilt of earths axis