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PowerPoint
PowerPoint

...  Nucleus: between 1km and 100km diameter  Coma: spherical cloud of gas and dust surrounding the nucleus  Tail: gas and dust that streams away from the comet. Caused by the solar wind, and always points away from the Sun. ...
early earth
early earth

... Collapsed disk not shown  Sun is about 5 billion years old  5 billion years until a red giant is formed ...
Earth Science Lecture
Earth Science Lecture

... a. anticyclones b. warm fronts c. cold fronts d. cyclones 15. ________ precipitation is a result of air being lifted over a highland area. a. convective b. frontal c. adiabatic d. orographic 16. The _________ of the air represents the actual quantity of water vapor held by the air a. relative humidi ...
Two Kinds of Planets - Physics and Astronomy
Two Kinds of Planets - Physics and Astronomy

... What is the main reason that many scientists think Mars may have once harbored life? What is the most likely origin of the two moons of ...
CHAPTER 1 Planets of the Solar System
CHAPTER 1 Planets of the Solar System

... astronomical unit is defined as the distance from Earth to the Sun. 1 AU equals about 150 million km, or 93 million miles. Table 1.2 shows the distances to the planets (the average radius of orbits) in AU. The table also shows how long it takes each planet to spin on its axis (the length of a day) a ...
Orbitals Graphing
Orbitals Graphing

... 2. Label the planets of our solar system on the picture at the top of the page (use only the planets in the table above). 3. Which planet has the shortest orbital period? ______________________ How long is it? ________ 4. Which planet has the longest orbital period? ______________________ How long i ...
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Document

... Geologic History of the Earth ...
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- Lexington JHS

... Composed of Hydrogen (H), Methane, Ammonia, and Water. This atm was possibly created by crashing comets. They brought water with them from space. The volcanoes that were erupting produced a lot of ...
CHAPTER 1 Planets of the Solar System
CHAPTER 1 Planets of the Solar System

... astronomical unit is defined as the distance from Earth to the Sun. 1 AU equals about 150 million km, or 93 million miles. Table 1.2 shows the distances to the planets (the average radius of orbits) in AU. The table also shows how long it takes each planet to spin on its axis (the length of a day) a ...
Chapter 1 Notes Using Geography Skills Section 1: Thinking Like a
Chapter 1 Notes Using Geography Skills Section 1: Thinking Like a

... Six months later—on or about December 22—the situation is reversed. The North Pole is tilted away from the sun. o ...
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Click here for Jeopardy1solarsystem

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Terrestrial Planets

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geol_311_solar_system[1].
geol_311_solar_system[1].

...  Body about 1/10 the mass of the Earth (Mars-sized) struck the Earth after it is half or more accreted, and after the Earth’s core had at least partially formed.  Material, mainly from silicate mantle, is blasted into orbit around the Earth, eventually accreting to form the Moon. ...
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Name Class Date

... a. heat produced when planetesimals collided with one another. b. heat generated when the increasing weight of its outer layers compressed its inner layers. c. the conversion of moving radioactive particles into heat energy. d. an irregular orbit that brought it closer to the sun. ______ 24. Dense m ...
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Motive Force for All Climate Change

... miles of rock into space. By Venturi effect, a portion of Earth’s atmosphere was sucked into space along with this material. The half-life of Uranium is 4.5 billion years. If natural decay were the only factor, then the earth would be half way thru our original supply of this fission material, but t ...
Copernicus and Galileo
Copernicus and Galileo

... Figured the length of time the planets take to orbit the sun from observations of how long they take to reappear at the same place in the night sky – Also figured out the distances to the planets ...
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Chapter 14

... Chapter 14 Section 1 1. Geocentric- an Earth-centered model. 2. Heliocentric- this sun-centered model. 3. Eclipse- is an oval shape, which may be elongated or nearly circular. 4. Moon- is a natural satellite that revolves around a planet. 5. Astronomical unit- equals Earth’s average distance from th ...
Other Objects in the Solar System
Other Objects in the Solar System

... being pulled to the Earth by Earth’s gravity. As it falls, it rubs against the molecules of the air. This rubbing, causes the rock to become hot and vaporize, and the air to glow. This is called a meteor, a bright streak of light across the sky. (shooting star) A meteorite is a rock which does not c ...
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EFFECT OF CENTRIFUGAL AND CORIOLIS FORCES DUE TO

... have their usual meaning. When a particle is at rest on the surface of earth which rotates with constant angular velocity ω about its polar axis, then: ...
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Earth-in-Space Topics

... – Amount of direct sunlight rays at any point on Earth tell that spot’s temperature – Hemisphere tilted toward sun experiences summer and longer days. Tilted away have winter – Equinox is equal length of day and night, caused by position of Earth in orbit around sun. Equinox is when Earth’s axis is ...
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Lecture PDF

... were formed within stars billions of years ago. Stars spend their lives changing hydrogen and helium into heavier elements. As they die, some stars eject the elements into space during cataclysmic explosions. The sun and planets, including Earth, condensed from a cloud of dust and gas enriched by th ...
Earth Science Study Guide Astronomy Test 4/29
Earth Science Study Guide Astronomy Test 4/29

... 13. How does planet distance from the sun affect the period of revolution? Closer the planet, the faster the period of revolution and shorter orbit 14. Which planet is called Earth’s sister? Give two reasons why? Venus, similar size & features. 15. What characteristic do the inner planets all have i ...
Name Date Hour_______ The solar system is made up of the Sun
Name Date Hour_______ The solar system is made up of the Sun

... The solar system is made up of the Sun and those celestial objects bound to it by gravity. These objects orbit around the sun. The planets’ orbits are almost circular. ...
Deep Space Galaxy
Deep Space Galaxy

... Uranus rotates in the opposite direction of the other four outer planets. Uranus is the seventh planet from the Sun. It remains in daylight for it’s year. ...
Chapter 5: Circular Motion and Gravitation
Chapter 5: Circular Motion and Gravitation

... Uniform circular motion is when a body moves in a circle at constant speed. The velocity, however, is not constant as its direction keeps changing. A changing velocity implies an acceleration. The radial acceleration aR (sometimes called centripetal acceleration) keeps the body moving in a circle of ...
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Earth's rotation



Earth's rotation is the rotation of the planet Earth around its own axis. The Earth rotates from the west towards east. As viewed from North Star or polestar Polaris, the Earth turns counter-clockwise.The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. This point is distinct from the Earth's North Magnetic Pole. The South Pole is the other point where the Earth's axis of rotation intersects its surface, in Antarctica.The Earth rotates once in about 24 hours with respect to the sun and once every 23 hours 56 minutes and 4 seconds with respect to the stars (see below). Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation. Atomic clocks show that a modern-day is longer by about 1.7 milliseconds than a century ago, slowly increasing the rate at which UTC is adjusted by leap seconds.
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