8-26-26 The Solar System By studying the geology, climatology (weather) and hydrology (water) of the other planets and moons and comparing them to those that we see on Earth, scientists can gain a better understanding of how these systems work in general, not just here. What we look for Geology: Volcanos, faults, earthquakes, mountains, and Plate tectonics Climatology: Clouds, weather, seasons, climate changes   Hydrology: Oceans, lakes, rivers, and groundwork   Terrestrial Planets There are 4  which are Mercury, Venus, earth, and Mars. They all are largely composed of rocks and metals and they have layered interiors  Mercury - Closest to the Sun GEOLOGY: Mercury is almost entirely dead but once had active volcanoes. It is the smallest planet and lost most of its internal heat long ago. Today, it is covered with craters. WATER: It has no liquid surface water. ATMOSPHERE: It has an extremely thin and insignificant atmosphere. Venus (2nd Planet) GEOLOGY: Venus has many active volcanoes (confirmed in 2023) and is probably seismically active. It may have some form of plate tectonics. WATER: None ATMOSPHERE: A uniformly hot (867 °F), dense atmosphere composed of 96% carbon dioxide and highly corrosive sulfuric acid rain. The Moon GEOLOGY: The Moon was volcanically active in the distant past but is almost completely dead now. Only minor releases of gas and some small "lunarquakes" still occur. WATER: No liquid surface water, but ice exists in some polar craters. ATMOSPHERE: No significant atmosphere. If it were not orbiting around Earth itself is would be considered at Planet  Mars (4th Planet) GEOLOGY: Mars is almost completely dead, but some volcanic activity may still be possible. Mars has the solar system's largest volcanoes, somewhat similar in type to those in Hawaii. NASA's InSight lander detected marsquakes. Scientists used them to examine the planet's interior structure. WATER: Mars has no liquid surface water today but had rivers and a shallow ocean in the past. Vast amounts of subsurface water still exist. Mars also has polar ice caps. ATMOSPHERE: It has a very thin atmosphere dominated by carbon dioxide. Seasonal planet-wide dust storms are common. Gas Giant Planets There are 2 gas giant planets in our solar system: Jupiter and Saturn. They are largely composed of the gases hydrogen and helium, with small rocky interiors. Gas giants do not have geology or oceans in the way we know them on Earth. 8-28-26 Jupiter - the Largest Planet ATMOSPHERE: Jupiter has high velocity winds and massive rotating weather systems, such as the Great Red Spot. Which are in the southern hemisphere, and storms in the northern hemisphere.  Although they appear similar to hurricanes (Low pressure systems), many of Jupiter's "storms" are anticyclones (high pressure). Jupiter's Moons The only geological features to be found in the region are on a few of Jupiter's moons: Io -The most volcanically active object in the solar system, with several active lava flows and lava lakes photographed and multiple eruptions recorded. Europa - Has a liquid ocean beneath a thick layer of ice. It also has some kind of geologic activity, similar to ice-based plate tectonics. Both the European Space Agency and NASA are sending missions to examine the moon in detail. Saturn - the Ringed Planet ATMOSPHERE: Generally similar to Jupiter MOONS: Titan - the only moon with a significant atmosphere (mostly nitrogen) and weather. It has clouds and rainfall based on methane (natural gas). Methane rivers flow across its surface, and methane lakes are found in polar regions. Enceladus - like Jupiter's moon Europa, it is believed to have an ice-covered ocean. A type of water-based volcanism (geysers) is active. Water has been seen erupting out of long fractures with enough energy to be ejected into space. Ice Giant Planets There are 2 ice giant planets in our solar system: Uranus and Neptune. Similar to gas giants, they have large amounts of hydrogen and helium in their atmospheres but have large mantles of ices above their small rocky cores. They are both relatively large and lack geology or oceans Uranus ATMOSPHERE: Similar to the gas giant planets, it has very high winds. MOONS: Miranda - a geologically complex satellite with one of the highest cliffs (over 3 miles) in the solar system. Neptune ATMOSPHERE: Similar to Uranus, but warmer even though it is farther from the Sun. MOONS: Triton - despite being extremely cold, it has active nitrogen geysers. Pluto - A Dwarf Planet Pluto has an atmosphere containing nitrogen, methane, ammonia, etc. It may freeze to the surface when it is far from the Sun. NASA's New Horizons mission examined the planet, finding active nitrogen glaciers and evidence of other recent geologic activity. 8-31-26 The Sun and the Earth  The Sun is very significant to life on Earth and the processes that affect it. It is the major source of Earth's surface heat, and its gravity has a significant influence on tides. However, the relationship between our planet and the Sun changes over time, so the Sun's energy output. The Suns Influence  Most weather systems and storms on Earth require heat energy to function. The majority of that comes from the Sun. Areas with more direct sunlight usually have more significant weather events - hurricanes in the tropics, tornadoes in mid-latitudes. Water heated by the sun plays a major role in regional weather and global climate  Heat, Weather and Climate Solar radiation plays the dominant role in Earth's weather and climate. Geologic heat (volcanic eruptions, plate tectonics) and heat from human activities often plays a more limited, but still significant, role. Any changes in the relationship of the Earth and Sun will influence weather and climate. This could be on a daily, yearly or even longer cycle. The Sun's Influence The Earth is closer to the Sun in January than it is in July (by about 3 million miles). So why is winter cold? The change in distance is not a major factor on a yearly basis. However, it does play a role over longer time periods when the situation is reversed (we are then closer in July). Long term climate can be significantly affected. Seasonal Influence The tilt of the Earth's axis is the primary cause of our seasons  Winter is cold because the Earth is tilted away from the sun, receiving less heat energy and days are shorter. Summer is warmer because the Earth is tilted towards the sun and days are longer. Regions near the equator have no significant seasons  The Sun and the Earth Longer term variations have also been linked to the Sun. One example is The Little Ice Age (~15th to 19th centuries). This occurred during a period of lower-than-normal solar activity. It's a bit more complex than that, however. Volcanic activity almost certainly played a large part in this climatic event as well, possibly acting as a trigger to start it. Changing Earth/Sun Relationships To make things even more complicated, Earth's orbit around the Sun and the tilt of Earth's axis change over time. This is widely believed to have a major influence on long-term global climate. Fortunately, these occur over very long periods of time and are of no significant concern In the near future 9-2-26 Near Earth Objects Asteroids and Comets that can closely Approach the Earth  On Oct. 15th, asteroid 2022 UP6 may pass Earth at a difference of less than 105,000 miles, closer than the Moon( (239,000) Impacts It was once thought that impact events were not significant on Earth, either now or in the past. That changed in the late 20th century. A large impact has recently been linked to massive global climate change that may have ended Earth's first ice age. Another impact may have triggered an ice age and a mass extinction event. Near-Earth Objects (NEOs) NEOs are asteroids or comets with orbits that either cross or closely approach the Earth. Most are small asteroids. There may be thousands of them in our solar system with diameters of 1 kilometer or more. A collision with an object that size would cause severe changes to our planet's climates. Significant impacts occur, on average, about once a century. Smaller ones have caused property damage and occasional injuries every few years. Scientists have discovered over 42,000 NEOs so far, but most are very small. Only a few are considered (extremely slight) impact risks. The Chelyabinsk Meteor On February 15, 2013, a meteorite over 60 feet in diameter and over 10,000 tons exploded over the Ural Mountains in Russia. The impact shock wave injured over 1500 people. NEOs: Asteroids (NEAS) Since most are small, it has been difficult to detect most of them until very recently. They can be composed of rock, metals or both. We now know that many asteroids are not very solid. They resemble large gravel piles held weakly together by gravity. Others are more metallic, made of iron and nickel. NEOs: Comets (NECs) They often travel at higher velocities than asteroids as they approach Earth's orbit. Comets are very similar to most asteroids except they contain much more ice. Although far fewer in number, they are easier to detect than asteroids because of their brightness as the ice vaporizes due to solar heating. NEC Impact A collision with a comet would not be much different than one involving most asteroids. Collisions are mainly about mass and velocity. A large comet could be more deadly than a large asteroid, if it hit with a higher velocity. NEOs: Impacts In late 2021, NASA launched the DART (Double Asteroid Redirection Test) mission to the asteroid Didymos to impact with its small moon Dimorphos in late September 2022. It was overwhelmingly successful - the impact changed the orbit of Dimorphos, demonstrating that NEOs can be redirected into safer orbits. Throughout the solar system, we can see examples of collisions between planets (and their moons) and asteroids/comets. The Moon is heavily cratered due to ancient impact events. So are most of the moons of every planet we have photographed. Mars and Mercury have many large craters. 9-4-26  Craters on Earth Once thought to be rare, scientists have now discovered over 194 confirmed impact craters on Earth. The vast majority don't look like the Moon's craters, however. Erosion and other surface processes on Earth have buried or deformed most of our craters. Barringer Crater in Arizona formed from an object about 150 feet in diameter. An Ancient Impact in Ohio In southern Ohio, the remains of an ancient impact crater are located beneath Serpent Mound. The heavily eroded crater is about 5 miles in diameter. 20th Century Impact In 1908, a comet exploded as it disintegrated over Tunguska, Siberia. Forests were destroyed over an area of 810 square miles, but no crater was left behind. This type of "impact" may be fairly common. It is estimated that if the impact would have occurred a few hours later, Moscow might have been destroyed. Importance of Plate Tectonics The process of plate tectonics reshapes the Earth's surface over time and is the key to our understanding of:  Earthquakes, tsunami, volcanoes Formation of major mountain ranges Formation and evolution of ocean basins Plate Tectonics and Earth's Interior Structure Unlike the earlier theory of continental drift, which only dealt with moving pieces of continental crust, plate tectonics involves the oceans as well. It also includes layers deeper in the Earth's interior- the lithosphere and the mantle. Earth's Structure CRUST: Oceanic Crust - relatively thin, composed of basalt (a volcanic rock) Continental Crust- thicker, made of granite. Basalt is denser than granite - this is very important in plate tectonic activity. Deeper Earth Structure MANTLE: The mantle is separated from the crust by a boundary layer. The rocks in this layer are solid, but due to high temperatures and pressures, they flow very slowly. The Earth's Core OUTER CORE: The outer core is molten (liquid) and largely made of iron and nickel. The Earth's magnetic field originates here. INNER CORE: The inner core is solid due to very high pressures. It is also mostly made of iron and nickel. The Earth's Interior: Other Layers The Lithosphere: The crust and uppermost part of the mantle Rocks in this layer are solid and brittle It is broken into pieces called plates The Asthenosphere: Part of the mantle below the lithosphere Rocks here are solid, but can flow slowly Plate Tectonics - The Basics Most of the large plates are named after the continents that they contain. The majority of the Pacific Ocean is also on one plate. Smaller plates are just as important as large ones- they are responsible for many earthquakes and volcanoes, such as those in Washington, Oregon and northern California. Plate Tectonics Plates are made of oceanic lithosphere (basalt), continental lithosphere (granite) or both. As the plates move, they interact with each other. This causes most of the world's large earthquakes, mountain ranges and major volcanoes. Geologic activity is generally found at or near plate boundaries. Divergent Plate Boundaries Plates separate & move away from each other. New plate material (oceanic lithosphere) is created as molten material fills in the rift. Most are located in the oceans (central Atlantic, caster Pacific, etc.), but some are on land (east Africa, Iceland). Location of Earthquakes and Volcanos The Mid-Atlantic Ridge Although it is mostly underwater, there are several islands located on top of it, such as Iceland and the Azores. The average spreading rate is about 1 inch per year. MAIN POINTS: New oceanic plate material is created. Small earthquakes are common, large ones are rare. Volcanic activity is common. Convergent Plate Boundaries Plates collide with each other. Plate material may be destroyed by subduction (if oceanic lithosphere is involved). Continental lithosphere does not subduct. The type of geologic activity depends upon what kind of lithosphere is involved Ocean-Ocean Convergent  One of the ocean floor plates is subducted. Volcanic activity creates island-arcs on the surviving plate. Earthquakes are common and may be large. Examples – Japan, Indonesia, Aleutian Islands Ocean continent convergent  The ocean floor plate is subducted, the continental plate is not. Volcanoes form on the edge of the continent. Earthquakes may be common and are potentially very large. Examples – west coasts of North and South America Continent Continent Convergent  Neither plate is subducted. Significant volcanic activity is unlikely. Earthquakes are relatively common and are potentially very large. Major mountain ranges are created. Examples – Himalaya Mts. and the Alps MAIN POINTS: Oceanic plate material is destroyed. Continental plate material isn’t subducted. Earthquakes of all sizes can occur. Volcanic activity is common if ocean floor is involved, but not at continent-continent boundaries. Transform Plate Boundaries Plates “slide” past each other. No new plate material is created, no old plate material is destroyed.  Most are found on the ocean floor, but some are on land – The San Andreas Fault. Volcanoes do not tend to form here. Motion along a transform plate boundary is not always smooth or continuous. Bends in the boundary can cause some sections to lock-up for long periods. This occurs near Los Angeles. Their last major earthquake was in 1857. Unlike the other plate boundaries which are created by movements of the asthenosphere, these mainly exist to connect divergent and/or convergent boundaries to one another. Despite their lack of volcanism, hot water (hydrothermal) systems are common and are major sites of exotic ecosystems. MAIN POINTS: Oceanic plate material is neither created nor destroyed. Earthquakes of all sizes can occur, but extremely large ones are not common. Significant volcanic activity is not likely. THINGS TO REMEMBER  Divergent activity creates new ocean floor material. Convergent activity destroys old ocean floor material. Transform activity does not create or destroy plate material, it just moves it to new locations. OTHER PLANETS AND MOONS: Know the geology, oceans and atmospheric conditions of the other planets (and their notable moons), types of planets. NEAR-EARTH OBJECTS (NEOs): Asteroids and comets; impacts of NEOs;     ancient impacts on Earth PLATE TECTONICS: The layers of the Earth – their composition and properties. What is significant about each layer. Earlier versions of the theory (Continental Drift, etc.) and how they differ from plate tectonics. PLATE TECTONICS: Types of plate boundaries – geologic activity (volcanoes, earthquakes, etc.), what kind of motion occurs (separation, collision, etc.), creation and    destruction of ocean floors.

Memeory

I & E Memeories

His Dark Meterials: The Amber Spyglass Day 3

Sanjar reading 2 meteorites

memeory long

Meteorites ✩°｡🧸𓏲⋆.🧺𖦹 ₊˚

Moons, Meteor-oids-rites

basic memeory ones of simple terms

ch 14-2 beyond Neptune and Meteoroids

tata SuryaKumpulan dari benda-benda langit dengan matahri sebagai pusat yang dikelilingi oleh planet, meteoroid, asteroid dan komet disebut ... a. luar angkasa b. bintang-bintang c. tata surya d. galaksi Asteroid merupakan salah satu benda langit dalam tata surya yang beredar di antara planet ... a. venus dan bumi b. mars dan yupiter c. bumi dan mars d. yupiter dan saturnus Perhatikan pernyataan berikut ini 1 1. mempunyai cincin indah 2. planet terkecil 3. planet keempat dalam tata surya 4. termasuk planet jovian Ciri-ciri yang dimiliki oleh planet mars ditunjukan oleh nomor ... a. 1 b. 2 c. 3 d. 4 Benda langit yang mengelilingi matahari dengan orbit yang sangat lonjong disebut ... a. planet b. komet c. meteoroid d. asteroid Pernyataan berikut ini yang merupakan ciri-ciri dari venus adalah ... planet terkecil terlihat paling terang daripada planet lainnya mempunyai cincin yang indah temasuk planet jovian Pernyataan berikut ini yang disebabkan oleh rotasi bumi kecuali ... a. bentuk bumi pepat dibagian kutub b. rasi bintang yang berbeda-beda c. terjadinya siang dan malam d. pembelokan arah angin Bumi melakukan gerakan rotasi dan juga revolusi. Arah gerakan tersebut dari ... barat ke timur b. timur ke barat c. selatan ke utara d. utara ke selatan Waktu rotasi dan revolusi bulan sama, hal ini menyebabkan terjadinya ... gerhana bulan permukaan bulan yang telihat dari bumi selalu sama bulan mengelilingi bumi tiap 29 hari terbentuknya kalender komariyah Meteoroid yang memasuki atmosfer bumi tampak bepijar karena ... bertumbukan dengan benda lain b. bergesekan dengan atmosfer bumi c. menyerap panas sinar matahari d. mengeluarkan cahaya sendiri Bulan merupakan satu-satunya satelit bumi. Bulan melakukan tiga gerakan sekaligus yaitu ... a. Rotasi , revolusi ke bumi dan bersama-sam dengan bumi berevolusi ke matahari b. Rotasi, revolusi ke mars, dan bersama-sam dengan bumi berevolusi ke matahari c. revolusi ke mars, revolusi ke bumi dan bersama-sam dengan bumi berevolusi ke matahari d. Rotasi , revolusi ke bumi dan bersama-sam dengan mars berevolusi ke matahari Berikut ini yang termasuk planet terestrial kecuali ... bumi b. mars c. merkurius d. neptunus Planet merupakn benda langit yang tidak dapat memancarkan cahaya sendiri, berikut ini yang termasuk planet jovian kecuali ... jupiter b. venus c. uranus d. saturnur Susunan planet berikut ini dimulai dari yang paling dekat dari matahari sampai yang terjauh yaitu … merkurius, venus, bumi, mars, jupiter, saturnus, uranus, neptunus merkurius, venus, bumi, mars, jupiter, uranus,saturnus, neptunus neptunus, saturnus, uranus, jupiter, mars, bumi, venus, merkurius neptunus, saturnus, uranus, jupiter, bumi, mars, venus, merkurius Bumi tidak seperti bola akan tetapi pepat dikedua kutubnya, hal ini disebabkan oleh ... rotasi bumi b. revolusi bumi c. rotasi bulan d. revolusi bulan 15. Planet yang mendapatkan bintang pagi, bintang kejora atau bintang timur yaitu ... a. venus b. mars c. saturnus d. neptunus 16. Benda langit seperti planet yang berukuran relatif kecil dan beredar diantara orbit mars dan jupiter adalah ... a. asteroid b. meteoroid c. meteorit d. komet 17. Pernyataan berikut yang menunjukan peristiwa terjadinya gerhana matahari total yaitu ... a. bumi memasuki daerah umbra bulan b. bulan memasuki daerah umbra bumi c. bumi terletak diantara bulan dan matahari d. matahari memasuki umbra bulan 18. Planet dalam tata surya beredar mengelilingi matahari dengan orbit tetap karena ... a. gaya gravitasi matahari lebih besar dari gaya gravitasi planet b. gaya gravitasi matahari lebih kecil dari gaya gravitasi planet c. gaya gravitasi matahari sama dari gaya gravitasi planet d. gaya gravitasi matahari tidak lebih besar dari gaya gravitasi planet 19. Pernyataan berikut ini yang disebabkan oleh revolusi bumi kecuali ... a. Pergantian musim b. gerak semu harian matahari c. perubahan rasi bintang d. pananggalan kalender masehi 20. Pengelompokkan berdasarkan ukuran dan komposisi zat pembentuknya dibagi menjadi dua yaitu Planet Inferior dan Superior Planet Dalam dan Luar Planet Inferior dan Luar Planet Terestrial dan Jovian 21.Benda langit yang memasuki atmosfer bumi dan terbakar habis di atomsfer disebut Meteor Meteoroid Meteorit Bintang jatuh Gerakan perputaran bumi terhadap porosnya disebut Rotasi Revolusi Rotasi dan Revolusi Semua benar Gerhana Matahari cincin terjadi saat Bumi yang menutupi Matahari berada pada titik terjauhnya dari Bulan Bulan yang menutupi Matahari berada pada titik terjauhnya dari Bumi Matahari yang menutupi Bumi berada pada titik terjauhnya dari Bulan Matahari yang menutupi Bulan berada pada titik terjauhnya dari Bumi Faktor yang menyebabkan planet Merkurisus, Venus, Bumi, dan Mars disebut sebagai planet terestrial adalah... adanya tanda-tanda kehidupan di planet-planet tersebut planet-planet ini tersusun atas bebatuan adanya atmosfer yang melingkupi planet-planet tersebut planet-planet ini berada di dalam wilayah sabuk asteroid Planet-planet yang berukuran besar dan komposisinya penyusunnya dari es dan gas hidrogen disebut kelompok.. planet luar b. planet dalam c. planet terestrial d. planet jovian 26. Perhatikan pernyataan-pernyataan berikut 1. Terkenal dengan cincinnya 2. Dihuni oleh mahluk hidup 3. Mempunyai satu satelit 4. Berwarna kemerah-merahan Pernyataan di atas yang termasuk ciri-ciri planet Bumi adalah... a. 1) dan 2) b. 1) dan 3) c. 2) dan 3) d. 3) dan 4) 27. berikut merupakan lapisan matahari, kecuali … Fotosfer Kromosfer Korona Atmosfer Pehratikan pernyataan mengenai benda langit berikut! Mempunyai ekor yang menjauhi matahari Melakukan 3 gerakan sekaligus Orbitnya ellips dan sangat lonjong Materinya terdiri besi dan nikel Pernyataan yang benar mengenai komet adalah … 1 dan 2 1 dan 3 2 dan 3 2 dan 4 Perhatikan peristiwa berikut! Indonesia memiliki 3 daerah waktu WIB,WITA dan WIT Belahan bumi tertentu mengalami siang dan malam Pergantian musim di belahan bumi utara dan selatan Perbedaan lamanya siang dan malam Peristiwa tersebut yang diakibatkan rotasi bumi ditunjukkan nomor .. 1 dan 2 1 dan 3 2 dan 4 3 dan 4 Perhatikan gambar berikut! Gambar tersebut menunjukkan peristiwa ….

14.1-Meteors Vocabulary

Earth Science, Space & Chemistry Study Guide Glaciers 1. What are the two main types of glaciers? Mountain (alpine) Continental 2. What shape is a glacier-carved valley? U-shaped 3. What conditions are needed for glaciers to form? Cold summers Heavy snowfall Snow does not fully melt 4. Why are glaciers important? Store freshwater Shape land Affect climate Earth’s Layers & Plate Tectonics 5. What is the thinnest layer of Earth? Crust 6. What are the three main layers of Earth? Crust Mantle Core 7. What is plate tectonics? Earth’s crust is made of moving plates 8. What are the three plate boundaries? Divergent Convergent Transform Memory Trick Divergent = divide Convergent = collide Transform = slide past 9. What causes earthquakes? Movement of tectonic plates 10. What is an aftershock? Smaller earthquake after a major one 11. What is a fault? Crack in Earth where movement happens Rocks, Volcanoes & Erosion 12. Which rock forms when magma or lava cools? Igneous rock 13. What are the three rock types? Igneous Sedimentary Metamorphic Memory Trick Igneous = fire Sedimentary = layers Metamorphic = changed by heat and pressure 14. What is the difference between magma and lava? Magma = underground Lava = surface 15. What are the three volcano activity levels? Active Dormant Extinct 16. What are the three volcano shapes? Shield Composite Cinder cone 17. What is weathering? Breaking down rock 18. What is erosion? Movement of dirt and rocks by water, wind, ice, or gravity 19. What is mechanical weathering? Physical breaking of rock 20. What is chemical weathering? Rock changes chemically 21. What is terracing? Flat steps cut into hillsides to reduce erosion Caves 22. What is the most common type of cave? Solution cave 23. Difference between stalactites and stalagmites Stalactites hang from the ceiling Stalagmites grow from the floor Memory Trick Stalactites hold “tight” to the ceiling Stalagmites “might” reach the ceiling Important Earth Science Terms 24. What is uniformitarianism? Natural processes today worked the same in the past 25. Difference between soil and dirt Soil has nutrients and supports life 26. What is elevation? Height above sea level 27. How deep have scientists explored into Earth? Only partway through Earth’s crust Atmosphere, Weather & Climate 28. Layers of the atmosphere Troposphere Stratosphere Mesosphere Thermosphere Exosphere Memory Trick The Sky Makes Tiny Explosions 29. What causes seasons? Earth’s tilted axis 30. Difference between weather and climate Weather = short-term conditions Climate = long-term average weather 31. What causes tides? Gravity from the moon and sun Fossils & Resources 32. Types of fossils Mold Cast Trace fossils 33. Renewable vs nonrenewable resources Renewable = naturally replaced Nonrenewable = limited supply Space Unit Solar System 34. Planets in order from the Sun Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Memory Trick My Very Educated Mother Just Served Us Nachos 35. What is the hottest planet? Venus 36. Largest planet Jupiter 37. Smallest planet Mercury 38. Planet that rotates on its side Uranus 39. Inner planets Mercury Venus Earth Mars 40. Outer planets Jupiter Saturn Uranus Neptune 41. Gas giants Jupiter Saturn 42. Ice giants Uranus Neptune 43. Why is Pluto not considered a planet? It has not cleared its orbit 44. What keeps planets in orbit? Gravity 45. Rotation vs revolution Rotation = spinning Revolution = orbiting Space Objects 46. Asteroid Rock in space 47. Meteor Streak of light in atmosphere 48. Meteorite Meteor that hits Earth 49. Comet Ice and dust object with a tail Space Exploration 50. NASA program that put humans on the moon Apollo Program 51. First man on the moon Neil Armstrong 52. Space shuttle that exploded Challenger Sun & Stars 53. Two elements that make up most of the sun Hydrogen Helium 54. What are sunspots? Cooler, darker spots on the sun 55. Surface temperature of the sun About 11,000°F 56. Type of energy from the sun Electromagnetic energy 57. How long sunlight takes to reach Earth About 8 minutes 20 seconds 58. Brightness of a star depends on Distance from Earth Amount of light it gives off 59. Supernova Exploding star 60. Nova Temporary brightening of a star 61. Nebula Cloud of dust and gas in space 62. Plasma Material the sun is made of Moon & Eclipses 63. Solar eclipse Moon blocks sunlight from reaching Earth 64. Why the moon has many craters Almost no atmosphere to burn up meteors 65. Why we only see one side of the moon Moon rotates and revolves at the same speed 66. Moon phases to know New Moon Waxing Crescent Full Moon Waning Gibbous Last Quarter Shortcut New → Waxing → Full → Waning Space Vocabulary 67. Milky Way Our galaxy 68. Astronomy Study of space 69. Light-year Distance light travels in one year 70. Constellation Group of stars forming a pattern 71. Most common galaxy shape Elliptical galaxy Chemistry Basics 72. What is an ion? Atom that gains or loses electrons and becomes charged 73. Ionic bond Electrons transferred between atoms Metal + nonmetal 74. Covalent bond Atoms share electrons Nonmetal + nonmetal 75. Metallic bond Metals bonded with freely moving electrons Metal + metal 76. Valence electrons Electrons in the outer energy level 77. Atomic number Number of protons 78. Exothermic reaction Reaction that releases energy 79. What metals usually do with electrons Lose electrons easily 80. Sulfur’s atomic number 16 81. Carbon valence electrons 4 82. Protons in arsenic 33 Parts of an Atom 83. Proton Positive charge 84. Neutron Neutral charge 85. Electron Negative charge 86. Where particles are found Protons & neutrons = nucleus Electrons = electron cloud Periodic Table 87. Groups/Families Vertical columns Same valence electrons 88. Periods Horizontal rows Same number of energy levels Metals 89. Six characteristics of metals Shiny/lustrous Solid at room temperature Malleable Ductile Conduct heat/electricity Reactive Noble Gases 90. Why are noble gases nonreactive? Full valence electron shell Other Chemistry Terms 91. Electronegativity Ability of an atom to attract electrons 92. Free electron model Electrons move freely through metals 93. First law of thermodynamics Energy cannot be created or destroyed 94. Reactants Starting substances in a reaction 95. Products New substances formed Acids & Bases 96. pH scale 0–6 = acidic 7 = neutral 8–14 = basic Nutrition 97. Three macronutrients Carbohydrates Fats Proteins Examples Carbs = bread/pasta Fats = avocado/nuts Proteins = meat/beans 98

Meteor Exam 3

Comets, Asteroid, and Meteors

meteor. test

Meterials and Methods Exam 2

Meteorite

ES - Sujet 1 - Météorite Allende

Lecture 9: Technological Hazards & Meteorites