Главная > Реферат >Остальные работы
The Earth’s Rotation
The Earth is rotating around an axis (called its rotational axis). Some objects rotate about a horizontal axis, like a rolling log. Some objects, such as a skater, rotate about a vertical axis. The Earth’s axis is tipped over about 23.5? from vertical.
How do we define up and down in space? What would “vertical” mean? For the Earth, we can think of vertical as straight up and down with respect to the plane in which the Earth orbits the Sun (called the ecliptic).
Earth’s rotational axis always points in the same direction, so that the North Pole points towards the star Polaris. Think of the Earth as a spinning top, tipped over to one side.
The Earth rotates around once in 24 hours – that’s a rate of 1000 miles per hour!. The time it takes for the Earth to rotate completely around once is what we call a day. It’s Earth’s rotation that gives us night and day.
The combined effect of the Earth’s tilt and its orbital motion result in the seasons.
Science News March 1995
Astonomers weekly 1998
- ... Essay, Research Paper In this paper, DR. ARUP RATAN GHOSH puts cinema into the ... the experience of Globalisation rotates. Seeing Titanic all over the ... The Scalabrinian fathers in London also edit the most ... . The ensuing question, then, is: how is the regrounding ...
- Orgasm Unlimited Essay, Research Paper ======================================================================== F I N A L F A N T A S ... Edit some of the data ... the walkthrough, like how to kill the Molbors and the ... Field Screen 1) Rotates the camera view. Menu ...
- Carpal Tunnel Syndrome Essay, Research Paper Outline I. DefinitionII. IntroductionIII. ... not know why or how to establish which ... as possible- without rotating the rest of the arm- and ... before it s too late. Bibliography1. Edith J. Applegate. The Anatomy and ...
- Cat Scans Essay, Research Paper Cat Scans Images can ... This information might be how the image of the scene was formed and ... noise, object variation, object rotation, changes in lighting, and ... to edit, store, and transmit and can efficiently replace paper in ...
- ... Washington Carver: The Peanut Man Essay, Research Paper George Washington Carver ... instructor, Etta Budd, son of the head of the Department ... (Peanut Hearts), Peanut Hay Meal, Peanut Hull Bran ... crop diversifying and rotation, instead of the soil-exhausting ...