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Transcript
Name: ____________________________________________________ Entry #: ______ Chapter 4.4: Other objects in the Solar System Part 1 Asteroids • Very small, irregular shaped, rocky bodies • ______________________________________ • Not enough gravity to be ____________________________ Asteroid belt • Thousands of ________________________________ • Only make up _________________________ of Earth’s Moon mass • Never able to form intro a planet due to Jupiter's _________________________________________ pull Near-Earth Asteroids • Some cross Earth’s orbit and _____________________________ • There are over 4,500 known • One _______________________ m in diameter hits about once a year • Some are over 1 __________________________ in diameter • _________________________________________ keep looking for near-Earth asteroids to stop a collision Asteroid Missions • Scientists are very interested in studying __________________________________________ • They are made up of material that have not changed since the beginning of our solar system • Important for space travel • NEAR Shoemaker probe orbited the ________________________________________________ and landed • ______________________________________ Hayabusa brought back samples Meteors • Forms a streak ___________________________________ across the sky • _____________________________________ stars • Light comes from the material burning up in Earth’s ________________________________________ • ___________________________________ • When earth passes through a ____________________________________ pulling in more meteors Meteoroids • Small piece of matter(__________________________) before it enters earth’s atmosphere they are called Meteoroids • _______________________ in size • Boulder to a small sand grain • __________________________ together • Debris left over from comets Meteorites • When a meteoroid is dragged towards by ___________________________________ and enters Earth atmosphere • Friction and atmosphere heats the object up and turns into a _____________________________ • Provide Clues from our Solar system Comets • Small, ______________________ objects that orbit the sun • ____________________________ Orbits • When the comet gets close to the sun the ice evaporates and creates an atmosphere called an _______________ • Radiation from the sun push some of the gas and dust away creating a _______________________ • Can only see be seen if they have a tail, so they only appear near the Sun • _______________________________________ • Period is 75 years • Next time it will pass earth is 2061 Where comets come from • Short Period Comets • Long Period Comet Oort • Period less than 200 Years • Periods ranging from a thousand to • Kuiper Belt millions of years • Contains comets asteroids, and • Oort Cloud dwarf planets • Very far away • Carry material from the solar Warm-up: Draw where you would place the following and write one fact about each: Meteor, Meteoroid, Meteorite, Asteroid, and Comet. Part 2 Using your Webquest worksheet. What criteria is needed to be considered to be a planet? Dwarf Planets • We know that dwarf planets are only this way because their pathway is not __________________________ • ____________ in our solar system • Ceres, Pluto, Makemake, Haumea, and Eris Ceres • Rocky Body • Can be an __________________________________ • Located in __________________________________________________ • Spherical due to its gravitational pull Pluto • All the outer planets are gaseous except for __________________________ • Small and ______________ • Orbit is ______________________ • In ____________________________________ • 3 moons Haumea • Shaped like an _____________________________ • Orbit is ___________________________________ • 283 years to orbit • 4 hours to rotate • Rocky • ___________________________________ • ___________________________________ • Formed from an impact Makemake • Revolves every __________________________ years • _______________________________ of methane, ethane, and nitrogen ices Eris • Pluto's sister • _________________________________ dwarf planet • _________________________________
