Seasons

This object just completed a revolution The action of one object moving around another in an orbital path This object just completed a revolution

Revolution The Earth’s revolution takes about one year, or 365 days

Example - Revolution The Earth revolves around the Sun Earth Sun

Earth’s Tilt The Earth’s axis is tilted 23 ½ degrees Tilted Axis 23 ½ Degree Tilt Tilted Axis The Earth’s axis is tilted 23 ½ degrees

Earth’s Seasons Caused by the different Equator Axis Earth Northern Hemisphere Southern Hemisphere Sun Caused by the different hemispheres of the Earth being tilted more or less towards the Sun.

Earth’s Seasons The hemisphere tilted towards the Sun gets more direct More direct rays of light Less direct rays of light The hemisphere tilted towards the Sun gets more direct light rays from the Sun. Northern Hemisphere Southern Hemisphere Sun

Earth’s Seasons Less direct rays = winter More direct rays = summer Summer in this hemisphere Winter in this hemisphere Less direct rays = winter More direct rays = summer Northern Hemisphere Sun Southern Hemisphere

Earth’s Seasons When both hemispheres get an equal amount of light, we have fall or spring Northern Hemisphere Southern Hemisphere Sun

Earth’s Seasons Spring – Northern Hemisphere Summer Northern Hemisphere Winter Northern Hemisphere Fall – Northern Hemisphere The reason one hemisphere is tilted more towards the sun is due to the Earth’s revolution around the Sun

Fall and Spring North and South Hemispheres are getting an equal amount of Sun’s direct rays Sun Fall Spring

Winter Northern Hemisphere is getting less of the Sun’s direct rays Summer Winter

Summer Northern Hemisphere is getting more of the Sun’s direct rays Winter