1 / 13

Earth’s rotation

Earth’s rotation. The Earth spins on its axis. This causes day and night. It also causes the Coriolis Effect. The tendency of an object moving freely over Earth’s surface to curve away from its path of travel. The global winds curve. The Coriolis Effect provides evidence of Earth’s rotation.

zacharyj
Download Presentation

Earth’s rotation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Earth’s rotation • The Earth spins on its axis. • This causes day and night. • It also causes the Coriolis Effect. • The tendency of an object moving freely over Earth’s surface to curve away from its path of travel. • The global winds curve. • The Coriolis Effect provides evidence of Earth’s rotation.

  2. Earth’s rotation • Earth rotates counterclockwise as we look down on the North Pole. • This causes the Sun to rise in the East and set in the West.

  3. Earth’s revolution • The Earth revolves around the Sun. • The orbit is elliptical. • The Sun is at one focus. • One piece of evidence is that the position of constellations change over weeks and months.

  4. The period of revolution • The period of revolution is one year. • It is also 365.25 days. • Since the calendar counts days most calendars have 365 days. • Leap Year – Since the ¼ day accumulates every year it is necessary to add a day every four years. When it is leap year there are 366 days in that year. • The extra day is added as February 29th. • The next leap year is 2020.

  5. Tilt of the earth • The Earth is tilted on its axis at 23 ½ ˚ from perpendicular to the ecliptic. • Without this tilt we would not have seasons.

  6. seasons • Seasons are caused by two things. 1. The Earth revolving around the Sun. 2. The tilt of Earth on its axis.

  7. Vernal equinox • The Sun is directly over the equator. • The first day of Spring, March 21 or 22. • 12 hours daylight / 12 hours darkness everywhere.

  8. Summer solstice • The Sun is directly over the Tropic of Cancer. • The first day of Summer, June 21 or 22. • The day with the longest period of daylight. • All of Arctic Circle in daylight for 24 hours. • All of Antarctic Circle in darkness for 24 hours.

  9. Autumnal equinox • The Sun is directly over the equator. • The first day of Fall (Autumn), September 22 or 23. • 12 hours daylight / 12 hours darkness everywhere.

  10. Winter solstice • The Sun is directly over the Tropic of Capricorn. • The first day of Winter, December 21 or 22. • The day with the shortest period of daylight. • All of Antarctic Circle in daylight for 24 hours. • All of Arctic Circle in darkness for 24 hours.

  11. seasons • Seasons in the southern hemisphere are opposite the seasons in the northern hemisphere.

  12. seasons • How near the Earth is to the Sun has nothing to do with seasons. • Perihelion (closest point to the Sun) is January 3, 2019. • Aphelion (farthest point from the Sun) is July 4, 2019.

More Related