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Chapter 4 - Pierce Public Schools
Chapter 4 - Pierce Public Schools

... 67. fluorescence-- ability to glow under UV light 68. hardness-- ability of a mineral to resist being scratched 69. inorganic-- made up of nonliving materials 70. luster—how light reflects off a surface of a mineral 71. mineral-- natural inorganic, crystalline solid found in the earth’s crust 72. mi ...
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Life Cycles of Stars

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Days and Years

... any planet. In fact, the average distance from Earth to the moon is only about 30 times Earth’s diameter. How much time? Even so, it is quite far away. On an average, the moon is 384,400 kilometers from Earth. If there One revolution for Earth around the were a highway to the moon you could travel s ...
AE Module 5 Presentation
AE Module 5 Presentation

... This is what Pluto and Charon are thought to look like – even the best pictures of them show no details as they are so far away, so small, and receive such little light. ...
Milankovitch Cycles and Glaciation
Milankovitch Cycles and Glaciation

... Today a difference of only about 3 percent occurs between aphelion (farthest point) and perihelion (closest point). This 3 percent difference in distance means that Earth experiences a 6 percent increase in received solar energy in January than in July. This 6 percent range of variability is not alw ...
userfiles/602xxh/files/2013%e5%b1%8a%e9%ab%98%e4%b8%89
userfiles/602xxh/files/2013%e5%b1%8a%e9%ab%98%e4%b8%89

... most certain about are large—up to 25 times the size of Earth. According to Christophe Lovis, one of the scientists behind the finding, these five planets are similar to Neptune(海王星). “They’re made mainly of rocks and ice,” he said. “They’re probably not suitable for people to live in.” ...
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Stars and The Universe

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Characteristics of Stars WS Questions 1-20

... Answer all of the following questions by rephrasing and using complete sentences. If you do not rephrase or use complete sentences, you will automatically lose half of the points available. 1. If you could travel at the speed of light, how long would it take you to travel from Earth to the sun? ...
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FCAT 2.0 Practice/Sample Questions

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The Earth in the Universe - Sierra College Astronomy Home Page
The Earth in the Universe - Sierra College Astronomy Home Page

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13 - Joe Griffin Media Ministries

... used in reference to the motion of the outer planets (Mars, Jupiter, Saturn, and so forth). Though these planets appear to move from east to west on a nightly basis in response to the spin of Earth, they are most of the time drifting slowly eastward with respect to the background of stars, which can ...
The Sun - the University of Redlands
The Sun - the University of Redlands

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... KE = kinetic energy = energy of motion PE = potential energy = stored energy (resting) Gravitation – the attractive force that occurs between any 2 objects in the Universe : depend on mass(size) and distance **the larger the objects (planets) and the closer they are, the more gravitation F = m1m2 Di ...
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The Search for Worlds Like Our Own

... as a clearly defined science goal. Since the origin of life most likely requires a stable supply of energy, planets that could host life are likely to orbit within what is known as the habitable zone (HZ), a region relatively close to the parent star. The HZ is defined such that liquid water is like ...
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... •The orbits of the planets are all direct (i.e., move in a counter-clockwise direction when viewed from the north pole of the solar system) and close to circular. Exceptions are Mercury and Pluto which have orbit eccentricities of ~0.2. •The orbits all lie close to the same plane, the ecliptic. •Mos ...
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Practice test - astronomy

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Earth in the Universe Answer each in your binder or notebook. Date
Earth in the Universe Answer each in your binder or notebook. Date

... Which statement about stars is not accurate? A. A small group of stars is called a galaxy. B. Stars consist mainly of hydrogen and helium. C. Types of stars include red giants, super giants, and dwarf stars. D. Constellations of stars are found in different places in the sky. ...
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PHYS 1470 3.0 W16/17 Highlights of Astronomy Assignment #2

... 1. Compare the atmospheres of Venus, Earth and Mars. Write a ~1-page essay with single-line spacing and font size 12. 2. Can a celestial body hold an atmosphere? The average molecular kinetic energy of a gas at temperature, T, is given as . This energy is equal to the kinetic energy of the molecules ...
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Page pour l`impression

... To move a swing, we must give it an impulse at each passage, or maybe every two or three passages. In order to maintain the motion, it is important to give the impulses with the swing in the same position : the impulses must be in resonance with the swing. The impulse period (the time between two im ...
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Extraterrestrial life



Extraterrestrial life is life that does not originate from Earth. It is also called alien life, or, if it is a sentient and/or relatively complex individual, an ""extraterrestrial"" or ""alien"" (or, to avoid confusion with the legal sense of ""alien"", a ""space alien""). These as-yet-hypothetical life forms range from simple bacteria-like organisms to beings with civilizations far more advanced than humanity. Although many scientists expect extraterrestrial life to exist, so far no unambiguous evidence for its existence exists.The science of extraterrestrial life is known as exobiology. The science of astrobiology also considers life on Earth as well, and in the broader astronomical context. Meteorites that have fallen to Earth have sometimes been examined for signs of microscopic extraterrestrial life. Since the mid-20th century, there has been an ongoing search for signs of extraterrestrial intelligence, from radios used to detect possible extraterrestrial signals, to telescopes used to search for potentially habitable extrasolar planets. It has also played a major role in works of science fiction. Over the years, science fiction works, especially Hollywood's involvement, has increased the public's interest in the possibility of extraterrestrial life. Some encourage aggressive methods to try to get in contact with life in outer space, whereas others argue that it might be dangerous to actively call attention to Earth.
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