2 The Earth’s axis is tilted 23.50 from vertical. The axis always points in the same direction in space.
3 Seasons change depending on the amount of sunlight reaching the Earth as it revolves around the Sun.
4 Indirect SunlightLight is spread over a larger area (scattered) and it is less intense.Light covers a smaller area and it is more intense.Direct Sunlight
5 During our summer the northern hemisphere is tilted toward the Sun. Summer solstice June 21-22Direct SunlightDirect SunlightDirect SunlightThe hemisphere that is tilted toward the Sun receives more direct sunlight. The Sun rays are less scattered.
6 The Sun is visible for 24 hours in the Arctic Circle in June. The hemisphere that is tilted toward the Sun has longer days and shorter nights.The Sun is visible for 24 hours in the Arctic Circle in June.Summer solstice June 21-22
7 Winter Solstice December 21-22 During our winter the northern hemisphere is tilted away from the Sun.Indirect sunlightIndirect sunlightWinter Solstice December 21-22We are receiving sunlight at an indirect angle. The sun rays are scattered.
8 We receive less sunlight and less energy during winter. Indirect SunlightIndirect sunlightLess thermal energy (heat) means lower temperatures in the winter.
9 During fall and spring the Earth’s axis is parallel to the sun. SunlightSunlightSunlightSunlightVernal Equinox (Spring) –March 20 Autumnal Equinox (Fall) – September 22The northern and southern hemispheres get equal amount of sunlight.
10 December 20 Winter Solstice March 20Vernal EquinoxDecember 20 Winter SolsticeDirect SunlightIndirect SunlightJune 20 Summer SolsticeSeptember 22Autumnal Equinox