2012年雅思阅读考试考前冲刺试题(1)
... 11.答案:orbiting (第12段第1句:Since the discovery in 1995 of the first "exoplanet" - a planet orbiting a star other than the Sun - more than 200 others have been found by ground-based observatories.) 12.答案:harbour life (第13段:Until now the usual method of finding exoplanets has been to detect the "wobble" ...
... 11.答案:orbiting (第12段第1句:Since the discovery in 1995 of the first "exoplanet" - a planet orbiting a star other than the Sun - more than 200 others have been found by ground-based observatories.) 12.答案:harbour life (第13段:Until now the usual method of finding exoplanets has been to detect the "wobble" ...
Structure of the Solar System
... lighted. As the Moon revolves around Earth, different amount of its lighted and dark sides face Earth. The Moon’s phase depends on the part of the lighted half we can see. ...
... lighted. As the Moon revolves around Earth, different amount of its lighted and dark sides face Earth. The Moon’s phase depends on the part of the lighted half we can see. ...
PHAS 2B17 Physics of the Solar System
... solar heating and sublimation. Once clear of the nucleus, molecules in the coma are exposed to direct solar radiation and can be damaged in various ways. Most molecules are broken apart ("dissociated") within a day of leaving the nucleus. For example, and are both reactions in which a molecule relea ...
... solar heating and sublimation. Once clear of the nucleus, molecules in the coma are exposed to direct solar radiation and can be damaged in various ways. Most molecules are broken apart ("dissociated") within a day of leaving the nucleus. For example, and are both reactions in which a molecule relea ...
mayreview3
... •Uranus –System of narrow, rope-like rings discovered around Uranus in 1970’s. • How were they detected? •What are they made of? • Why are they not immediately visible through a telescope, as are Saturn’s rings? ...
... •Uranus –System of narrow, rope-like rings discovered around Uranus in 1970’s. • How were they detected? •What are they made of? • Why are they not immediately visible through a telescope, as are Saturn’s rings? ...
Ex3-Planets,F10
... thousands of kilometers an hour relative to the target. On a solid surface the collision will leave an impact crater. A relatively fresh impact crater may send rays of ejecta across the land, and large craters will generally have a raised area in the center caused by the rebound of rocks compressed ...
... thousands of kilometers an hour relative to the target. On a solid surface the collision will leave an impact crater. A relatively fresh impact crater may send rays of ejecta across the land, and large craters will generally have a raised area in the center caused by the rebound of rocks compressed ...
Characteristics of Near
... Essentially spherical in shape Orbit the Sun Have a gravitational field Can rotate May be made of materials similar to Earth Possess moons Thousands of examples Most have atmospheres Have less predictable orbits Have a variety of shapes Formed after the Big Bang 4 billion years ago. Have craters Som ...
... Essentially spherical in shape Orbit the Sun Have a gravitational field Can rotate May be made of materials similar to Earth Possess moons Thousands of examples Most have atmospheres Have less predictable orbits Have a variety of shapes Formed after the Big Bang 4 billion years ago. Have craters Som ...
apparent retrograde motion - Indiana University Astronomy
... was motivated by inadequacy of existing predictions made very accurate observations of positions (this was prior to the development of the ...
... was motivated by inadequacy of existing predictions made very accurate observations of positions (this was prior to the development of the ...
29:52 Characteristics and Origins of the Solar System January 25
... The second of these lines is the ecliptic. The ecliptic is the projection of the Earth’s orbital plane on the celestial sphere. If we plotted up all the positions of the Sun against the background stars, it would trace out the ecliptic. Because of the 23.5 degree tilt of the Earth’s axis, the celest ...
... The second of these lines is the ecliptic. The ecliptic is the projection of the Earth’s orbital plane on the celestial sphere. If we plotted up all the positions of the Sun against the background stars, it would trace out the ecliptic. Because of the 23.5 degree tilt of the Earth’s axis, the celest ...
Standard 4: Earth in Space
... D. Planets and their moons have been shaped over time by common processes such as cratering, volcanism, erosion, and tectonics. The presence of life on a planet can contribute to its unique development. Level: Compact ...
... D. Planets and their moons have been shaped over time by common processes such as cratering, volcanism, erosion, and tectonics. The presence of life on a planet can contribute to its unique development. Level: Compact ...
Chapter 4 - Pierce Public Schools
... 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone-- region in sun where energy is transferred by electromagnetic wa ...
... 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone-- region in sun where energy is transferred by electromagnetic wa ...
Chapter 4 - Pierce Public Schools
... 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone-- region in sun where energy is transferred by electromagnetic wa ...
... 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone-- region in sun where energy is transferred by electromagnetic wa ...
Chapter 4 - Pierce Public Schools
... 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone-- region in sun where energy is transferred by electromagnetic wa ...
... 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone-- region in sun where energy is transferred by electromagnetic wa ...
Earth`s Layers
... Weathering Any action that breaks rocks into pieces Changes can be very slow Weathering goes on all the time plants and water can cause weathering ...
... Weathering Any action that breaks rocks into pieces Changes can be very slow Weathering goes on all the time plants and water can cause weathering ...
Seasons:
... Since antiquity, astronomers have observed all of the visible planets (Mercury, Venus, Mars, Jupiter, and Saturn) undertake similar motions. This motion has been problematic for incorrectly explained for 1000’s of years. ...
... Since antiquity, astronomers have observed all of the visible planets (Mercury, Venus, Mars, Jupiter, and Saturn) undertake similar motions. This motion has been problematic for incorrectly explained for 1000’s of years. ...
The most important questions to study for the exam
... Earth during a total solar eclipse, from inside of which no part of the solar disk is visible, is • very large, extending over the whole sunlit Earth, such that everyone on this side of Earth sees an eclipse. • about as large as the Moon, with a diameter of about 3500 km. • very small, with a typica ...
... Earth during a total solar eclipse, from inside of which no part of the solar disk is visible, is • very large, extending over the whole sunlit Earth, such that everyone on this side of Earth sees an eclipse. • about as large as the Moon, with a diameter of about 3500 km. • very small, with a typica ...
8-4.1 - S2TEM Centers SC
... The stars “come out at night” and are not always present in the sky. (The Sun’s light prevents us from seeing stars during the day.) There are thousands of stars in our solar system. (There is just one star in our solar system – the Sun.) Because the apparent diameter of the Sun in the sky fro ...
... The stars “come out at night” and are not always present in the sky. (The Sun’s light prevents us from seeing stars during the day.) There are thousands of stars in our solar system. (There is just one star in our solar system – the Sun.) Because the apparent diameter of the Sun in the sky fro ...
Jupiter – key facts Largest and most massive planet in the Solar
... shows different ages suggesFng that a semi-‐liquid mantle may exist under the icy crust Callisto – the most distantly orbiFng of the galilean satellites. Mean density suggests that Callisto is largel ...
... shows different ages suggesFng that a semi-‐liquid mantle may exist under the icy crust Callisto – the most distantly orbiFng of the galilean satellites. Mean density suggests that Callisto is largel ...
New science on the young sun, and Earth migration
... circular in its orbit, with an eccentricity of only 0.055. Such a low eccentricity for Venus does not seem to suggest a significant catastrophic event in the past. However, note that the orbital eccentricity is not a constant. For our moon, it is possible past impacts could have caused oscillations ...
... circular in its orbit, with an eccentricity of only 0.055. Such a low eccentricity for Venus does not seem to suggest a significant catastrophic event in the past. However, note that the orbital eccentricity is not a constant. For our moon, it is possible past impacts could have caused oscillations ...
Owsley Brown II Portable Planetarium K-2 Program
... ● When objects collide, the contact forces transfer energy so as to change the objects’ motions. (4-PS3-3) ● The energy released [from] food was once energy from the sun that was captured by plants in the chemical process that forms plant matter (from air and water). (5-PS3-1) ● An object can be see ...
... ● When objects collide, the contact forces transfer energy so as to change the objects’ motions. (4-PS3-3) ● The energy released [from] food was once energy from the sun that was captured by plants in the chemical process that forms plant matter (from air and water). (5-PS3-1) ● An object can be see ...
Science 09 Space Review 1. Know what a light year is
... b) Our sun is in adulthood http://sunshine.chpc.utah.edu/Labs/StarLife/starlife_main.html c) A red giant fuses helium into carbon and this requires higher temperatures than fusing hydrogen into helium which is what our sun does d) Once a star runs out of fuel for fusion, the thermal pressure outward ...
... b) Our sun is in adulthood http://sunshine.chpc.utah.edu/Labs/StarLife/starlife_main.html c) A red giant fuses helium into carbon and this requires higher temperatures than fusing hydrogen into helium which is what our sun does d) Once a star runs out of fuel for fusion, the thermal pressure outward ...
Late Heavy Bombardment
The Late Heavy Bombardment (abbreviated LHB and also known as the lunar cataclysm) is a hypothetical event thought to have occurred approximately 4.1 to 3.8 billion years (Ga) ago, corresponding to the Neohadean and Eoarchean eras on Earth. During this interval, a disproportionately large number of asteroids apparently collided with the early terrestrial planets in the inner Solar System, including Mercury, Venus, Earth, and Mars. The LHB happened after the Earth and other rocky planets had formed and accreted most of their mass, but still quite early in Earth's history.Evidence for the LHB derives from lunar samples brought back by the Apollo astronauts. Isotopic dating of Moon rocks implies that most impact melts occurred in a rather narrow interval of time. Several hypotheses are now offered to explain the apparent spike in the flux of impactors (i.e. asteroids and comets) in the inner Solar System, but no consensus yet exists. The Nice model is popular among planetary scientists; it postulates that the gas giant planets underwent orbital migration and scattered objects in the asteroid and/or Kuiper belts into eccentric orbits, and thereby into the path of the terrestrial planets. Other researchers argue that the lunar sample data do not require a cataclysmic cratering event near 3.9 Ga, and that the apparent clustering of impact melt ages near this time is an artifact of sampling materials retrieved from a single large impact basin. They also note that the rate of impact cratering could be significantly different between the outer and inner zones of the Solar System.