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Science_Lab_Yellow / Lesson 2: Rotation and Different Seasons

Rotation and Seasons
What will we be learning today?


  • In this lesson, we are going to learn all about rotation of the Earth and why we have different seasons.

  • We will begin today's lesson, by why the Earth rotates.


Rotation


  • How can it be afternoon in Ohio but the middle of the night in Asia?

  • The answer is that the Earth moves

  • The Earth moves around the Sun

  • As the Earth moves around the Sun, it spins or rotates

  • It is Earth's rotation that causes day and night

  • The rotation of Earth changes day into night and night into day

  • One complete rotation on the Earth's axis takes 24 hours, or one whole day


Axis


  • You can't feel Earth's rotation, but standing on Earth is like riding a giant top

  • The imaginary line drawn from the North Pole to the South Pole is the Earth's axis

  • An axis is a real or imaginary line that a spinning object turns around

  • As Earth rotates, it turns about its axis just like a top spins around its axis

  • However, the Earth's axis is tilted

  • Earth is tipped at an angle




Seasons


  • Seasons change by the average temperatures that rise and fall because of where the Earth is      located to the Sun

  • Revolution is one complete trip around the Sun which takes 365 days = one year

  • Parts of Earth are closer to the Sun during part of the year and farther away during the other part      of the year, which causes the different seasons

  • The closer a place is to the equator, the less change in temperatures from season to season      because the sun hits the equator the same year round






  • Seasons are opposite of each other for the Northern and Southern Hemispheres

  • If you live in the Northern Hemisphere and are having summer, then in the Southern     Hemisphere you are having winter

    The 4 Seasons are:

    1. Winter

    2. Spring

    3. Summer

    4. Fall


  • Let's Review What We Learned Today!


  • Earth's rotation on its axis and going around the Sun causes the cycle of day and night, and the     four seasons

  • One day on Earth is the time needed for one rotation - 24 hours

  • The Earth does this rotation 365 times each year = 365 days in a year

  • The Earth revolves around the Sun which causes the different seasons

  • The closer to the Sun the warmer (Summer) and the further from the sun the colder (Winter)


  • It takes one whole year for Earth to move around the Sun = 365 days