Why the earth doesn't receive the same amount of heat

• Places closest to the equator receive more heat from the sun. Insolation decreases as you move northwards or southwards from the equator to the poles.
• This means that areas closer to the equator get much more direct sunlight than those close to the poles.
• As we move away from the equator towards the tropics, the solar angle becomes less steep. The further away from the equator we go, the smaller the solar angle gets until it reaches zero at the Tropic of Cancer and Capricorn.
• The Earth is tilted at 23.5 degrees to the equator.This is has an impact on the amount of heat received by the Earth at various times of the year. Heating of the sun is not the same throughout the year. It is hotter in summer than in winter.
• The Earth is rotating on a day ti day basis, spinning takes 24 hrs in that 24 hrs it both faces towards and away from the sun and this results in day and night
• During the summer months, the northern hemisphere tilts towards the sun so there are longer days with lots of insolation. During the winter months, the southern hemisphere tilts towards the sun so there are shorter days with little insolation
• In the Northern Hemisphere, during the summer solstice, the North Pole points directly towards the Sun. This means that the North Pole receives maximum insolation. In contrast, during the winter solstice, the South Pole points directly towards the Sun. This means that the South Pole receives minimum insolation.
• At the Equator, the sun shines straight down onto the surface all year round. At the Poles, the sun never rises above the horizon during the winter months.
• The Earth itself is also tilted at a 23.5 degree angle which means that the suns rays will not strike all places at a perpendicular angle and this affects the length of day and night and also the amount of heat received
• The revolution around the sun also results in an autumn equinox (21 march) which has an equal length of day and night and hereafter days become shorter. A winter solstice (21 June) which results in the shortest day and longest night hereafter days become longer.
• Summer solstice (21 December) which results in the longest day and shortest night and hereafter days become shorter. Spring equinox (21 September) which results in an equal length of day and night hereafter days become longer