Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Kuiper belt wikipedia , lookup
Heliosphere wikipedia , lookup
Scattered disc wikipedia , lookup
Standard solar model wikipedia , lookup
Planets beyond Neptune wikipedia , lookup
Jumping-Jupiter scenario wikipedia , lookup
Dwarf planet wikipedia , lookup
Definition of planet wikipedia , lookup
Planets in astrology wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
CHAPTER NEW CHAPTER Our Solar System the BIG idea Planets and other objects form a system around our Sun. 21.1 Planets orbit the Sun at different distances. 21.2 The inner solar system has rocky planets. 21.3 The outer solar system has four giant planets. 21.4 Small objects are made of ice and rock. CHAPTER OUTLINE CHAPTER RESOURCES 21.1 CHAPTER HOME KEY CONCEPT Planets orbit the Sun at different distances. The planets have different sizes and distances from the Sun. VOCABULARY astronomical unit (AU) ellipse inner solar system Mercury, Venus, Earth, Mars, asteroids outer solar system Jupiter, Saturn, Uranus, Neptune, Pluto, comets VISUALIZATION CLASSZONE.COM Take a virtual spaceflight through the solar system. CHAPTER RESOURCES SECTION OUTLINE 21.1 KEY CONCEPT CHAPTER HOME Planets orbit the Sun at different distances. The planets have different sizes and distances from the Sun. The solar system formed from a disk of dust and gas. Massive objects became round. VOCABULARY astronomical unit (AU) ellipse CHAPTER RESOURCES SECTION OUTLINE 21.2 CHAPTER HOME KEY CONCEPT The inner solar system has rocky planets. • The terrestrial planets are round and have layers. • Atmospheres came from volcanoes and impacts. • Four processes produce surface features. VOCABULARY terrestrial planet tectonics volcanism tectonics volcanism CHAPTER RESOURCES weathering and erosion impact cratering SECTION OUTLINE 21.3 KEY CONCEPT CHAPTER HOME The outer solar system has four giant planets. • The gas giants have very dense, deep atmospheres with layers of clouds. • All four giant planets have ring systems. VOCABULARY gas giant ring CHAPTER RESOURCES Close-up of Saturn’s rings SECTION OUTLINE 21.4 KEY CONCEPT CHAPTER HOME Small objects are made of ice and rock. • Objects in the inner solar system are rocky. • Pluto and most other objects in the outer solar system are made of ice and rock. • Rocky asteroids and icy comets orbit the Sun and produce tiny fragments that may become meteors. VOCABULARY asteroid comet meteor meteorite CHAPTER RESOURCES The asteroid Eros SECTION OUTLINE 21.1 KEY CONCEPT CHAPTER HOME Planets orbit the Sun at different distances. I. Planets orbit the Sun at different distances. A. Planets have different sizes and distances. 1. Distances VOCABULARY astronomical unit (AU) ellipse 2. Orbits B. The solar system formed from a swirling cloud of gas and dust. CHAPTER RESOURCES KEY CONCEPT SUMMARY 21.2 CHAPTER HOME KEY CONCEPT The inner solar system has rocky planets. II. The inner solar system has rocky planets. A. The terrestrial planets have rocky crusts. 1. Processes and Surface Features 2. Atmospheres VOCABULARY terrestrial planet tectonics volcanism B. Craters cover the surface of Mercury. C. Volcanoes shape the surface of Venus. D. Erosion changes the appearance of Mars. 1. Surface of Mars 2. Gases and Water on Mars CHAPTER RESOURCES KEY CONCEPT SUMMARY 21.3 KEY CONCEPT CHAPTER HOME The outer solar system has four giant planets. III. The outer solar system has four giant planets. A. The gas giants have very deep atmospheres. VOCABULARY gas giant ring B. Jupiter is a world of storms and clouds. C. Saturn has large rings. D. Uranus and Neptune are extremely cold. 1. Uranus 2. Neptune CHAPTER RESOURCES KEY CONCEPT SUMMARY 21.4 KEY CONCEPT CHAPTER HOME Small objects are made of ice and rock. IV. Small objects are made of ice and rock. A. Pluto and most objects in the outer solar system are made of ice and rock. VOCABULARY asteroid comet meteor 1. Pluto and Charon meteorite 2. Moons of Gas Giants B. Asteroids and comets orbit the Sun. 1. Asteroids 2. Comets 3. Meteors and Meteorites CHAPTER RESOURCES KEY CONCEPT SUMMARY CHAPTER HOME Chapter Resources Image Gallery Review Game Animations Click here to review chapter images and animations Play a fun interactive review game Link to all the McDougal Littell Science animations Click on the items below to access resources on Audio Readings Resource Centers Hear chapter audio readings Get more information on select science topics Content Review Standardized Test Practice Review key concepts and vocabulary 4 % CE 7 1 0 2 6 5 4 3 9 8 3 2 . Math Tutorial M+ M– M CC ON/C 5 1 CLASSZONE.COM Review math concepts BACK TO CHAPTER Practice state standardized tests