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Planets

2018 review for planets quiz

TermDefinition
Inner Planets Common features: Mercury, Venus, Earth, and Mars Small and dense Rocky surfaces “Terrestrial” planets Solid surfaces All have an atmosphere (EXCEPT Mercury)
Sun Center of our solar system (Heliocentric model) Star
Mercury Smallest and closest to the sun About the size of earth’s moon Scarred by craters on the surface Virtually no surface Small mass = weak gravity Side facing sun very hot, side away very cold (extreme temperatures) Can not support life
Venus Second planet from the Sun Called “Earth’s twin” because of similar size and mass Thick atmosphere; always cloudy Unusual pattern of rotation Hottest planet of the Solar System Surface is covered in rock, volcanoes Can not support life
Earth 3rd planet from Sun Only planet where you could live easily Liquid water Suitable temperature ranges Atmosphere Oxygen
Mars 4th planet from the sun “Red planet”: iron oxide in rocks Water Atmosphere is 95% carbon dioxide Surface Moons: Phobos and Deimos
Asteroid belt: Separates inner planets from outer planets Jupiter, Saturn, Uranus, Neptune
Outer Planet common features: Larger and more massive than inner planets No solid surfaces “Gas giants” Strong gravitational force (keeps gases from escaping and forming a thick atmosphere) Extremely cold: because so far from sun Many moons Surrounded by a set of rings
Jupiter 5th planet from the sun Largest and most massive planet Thick atmosphere Great red spot (A storm larger than Earth; swirling winds similar to a hurricane (shows no signs of going away) Largest moons (Ganymede, Callisto, Io, Europa
Saturn 6th planet from sun 2nd largest planet Also contains clouds and storms “Ringed Planet”: made of chunks of rock & ice in its own orbit around Saturn; broad & thin Titan-largest moon; only moon with a thick atmosphere Lowest density of any planet
Uranus 7th planet from the sun Blue-green in color because of methane gas in atmosphere Thin, flat rings 5 largest moons have icy, cratered surfaces At least 27 moons! Axis of rotation is tilted at an angle of 90 degrees (see pg 256) Rotates top to bottom
Neptune 8th planet from the sun Similar in size & color to Uranus (Blue-green because of methane gas) Atmosphere contains visible clouds Great Dark Spot (1989); gone 5 years later; has had multiple other dark spot storms At least 13 moons: largest is Triton
Created by: AvniArora