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Chapter 26, Section 2

Chapter 26, Section 2. Vocabulary. Create flashcards and study the following words: Rotation Revolution Perihelion Aphelion Equinox Solstice. The Rotating Earth. The spinning of the Earth on its Axis is called ROTATION. Rotation creates Day and Night Evidence of Rotation—

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Chapter 26, Section 2

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  1. Chapter 26, Section 2

  2. Vocabulary • Create flashcards and study the following words: • Rotation • Revolution • Perihelion • Aphelion • Equinox • Solstice

  3. The Rotating Earth • The spinning of the Earth on its Axis is called ROTATION. • Rotation creates Day and Night • Evidence of Rotation— • Foucault Pendulum • Coriolis Effect • Day and Night

  4. The Revolving Earth • Earth spins on its axis (rotation) and it also travels or REVOLVES around the sun • Complete revolution of the sun takes 365 ¼ days. • Every four years we add a day…leap year • Perihelion=point in orbit closest to the sun • Aphelion =point in orbit farthest from the sun

  5. Evidence of Earth’s Motion Evidence of Rotation Evidence of Revolution Over several weeks a constellations place in the sky will appear to change and at different times of year, different constellations will be visible. See pictures page 669 • If you watch the night sky over a couple of hours, the stars and constellation patterns appear to move in the sky • The moon and sun also appear to change places in the sky

  6. Measuring Time • Earth’s motion is the basis for measuring time • One day is 24 hours—the amount of time it takes Earth to rotate (spin on its axis) • One year is 365 ¼ days –the amount of time it takes to travel (revolve) around the sun

  7. Mayan Aztec Calendar • Ancient civilizations: • Egyptians first to use a solar year • Aztecs used a stone calendar to know when to plant • Julius Caesar began leap year • Modern Calendar: • 1500s, Pope Gregory XIII created a calendar to fit the seasons Roman

  8. Measuring Time • Time Zones—24 1 hour periods

  9. Seasons • Fall and Spring begin on an EQUINOX • Winter and Summer begin on a SOLSTICE • Brain Pop—Seasons and Solstice and Equinox

  10. Interactive/Assessment • Constellation Project!

  11. INTERACTIVE/Assessment Use the diagram on page 562 or the one below and copy and label it in your notes.

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