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Planets Lesson


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An overview lesson of the planets in the solar system with an online activity.

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Planets Lesson

  1. 1. Earth Science Mrs. Harris
  2. 2. This week’s objectives <ul><li>Characteristics of the inner planets </li></ul><ul><li>Characteristics of the outer planets </li></ul><ul><li>Comparing the size and distance </li></ul>
  3. 3. Inner Planets <ul><li>Also called Terrestrial Planets </li></ul><ul><li>Composed mostly of rock </li></ul><ul><li>Closest to the sun </li></ul><ul><ul><li>Mercury, Venus, Earth, & Mars </li></ul></ul>
  4. 4. Mercury <ul><li>Takes 88 Earth days to travel around the sun </li></ul><ul><li>Takes 59 days to rotate once on its axis </li></ul><ul><li>Being so close to the sun, it gets really hot! But without much of an atmosphere the heat leaves quickly! </li></ul><ul><ul><li>Today on Mercury we’ll have a balmy high of 800 o F and a night time low of chilly -280 o F </li></ul></ul>
  5. 5. Venus <ul><li>Takes 225 days to orbit the sun </li></ul><ul><li>Takes 243 days to rotate on its axis!!! </li></ul><ul><li>Most similar to Earth (size, density, distance from sun)… however… </li></ul><ul><li>Atmosphere of 97% carbon dioxide- it’s greenhouse effect is extreme! </li></ul><ul><ul><li>If you like sunny days and temperatures around 860 o F, then Venus is for you! </li></ul></ul>
  6. 6. Earth <ul><li>Takes 365 ¼ days to orbit the sun </li></ul><ul><li>Rotates on its axis once a day </li></ul><ul><li>One moon named Moon  </li></ul><ul><li>Amazing combination of liquid water and an oxygen-rich atmosphere to support life </li></ul><ul><li>Temperatures range from -160 o F to 140 o F </li></ul>
  7. 7. Mars <ul><li>Takes 687 days to orbit the sun </li></ul><ul><li>Takes about 24 hours to rotate on it’s axis </li></ul><ul><li>Because of a tilt in the axis, Mars also experiences seasonal changes </li></ul><ul><li>Two moons: Phobos and Deimos </li></ul><ul><li>Temperatures from -125 o F to 23 o F </li></ul>
  8. 8. Martians? <ul><li>Scientists have been looking for evidence of life on Mars </li></ul><ul><li>Scientists have also been looking for water on Mars </li></ul><ul><li>Some think it is possible for us to make an atmosphere on Mars to eventually make it a second planet for us! We could be the first Martians! </li></ul><ul><li> </li></ul>
  9. 9. Outer Planets <ul><li>Also called the Gas Giants </li></ul><ul><li>An asteroid belt separates the inner and outer planets </li></ul><ul><li>All the Gas Giants are less dense than the inner planets and they all have rings </li></ul><ul><ul><li>Jupiter, Saturn, Uranus, & Neptune </li></ul></ul><ul><ul><li>(Remember Pluto was taken off the list of official planets and is now a dwarf planet) </li></ul></ul>
  10. 10. Jupiter <ul><li>Takes 12 years to orbit the sun </li></ul><ul><li>Fastest rotation: about 10 hours on its axis </li></ul><ul><ul><li>Jupiter’s mass = mass of all other planets x 2! </li></ul></ul><ul><ul><li>Made of mostly helium and hydrogen </li></ul></ul><ul><li>Has about 60 moons! Four are the size of small planets: Io, Europa, Callisto, & Gannymede </li></ul><ul><li>The Great Red Spot (3 Earth’s would fit in it) </li></ul><ul><li>Average temperature: a brisk -230 o F </li></ul>
  11. 11. Saturn <ul><li>Takes 29 ½ years to orbit the sun </li></ul><ul><li>Takes about 10 ½ hours to spin on it’s axis </li></ul><ul><li>Most famous for it’s rings- made of ice and dust debris </li></ul><ul><li>Saturn has 47 moons… so far </li></ul><ul><li>Saturn also consists mostly of helium and hydrogen, but is the least dense of all </li></ul><ul><li>You’ll find a chilly average temp of -280 o F </li></ul>
  12. 12. Uranus <ul><li>Takes 84 years to get around the sun </li></ul><ul><li>Rotates on it’s axis every 17 hours </li></ul><ul><li>Unlike other planets, it’s axis mostly points towards the sun </li></ul><ul><li>Has 27 moons and 11 rings </li></ul><ul><li>Also, mostly made of helium and hydrogen but it’s blue appearance comes from methane in the atmosphere </li></ul><ul><li>Cool blue -360 o F </li></ul>
  13. 13. Neptune <ul><li>Takes about 164 years to orbit the sun </li></ul><ul><li>Rotates on it’s axis about every 16 hours </li></ul><ul><li>Is also blue because of methane </li></ul><ul><li>It was known before it was seen! Because it affects the orbit of Uranus, astronomers were able to figure out where Neptune was located before it was seen! </li></ul><ul><li>13 moons and 6 rings and a nippy -350 o F </li></ul>
  14. 14. Pop Quiz <ul><li>What is the name of the region beyond the Gas Giants? </li></ul><ul><li>* hint… it’s a belt* </li></ul>
  15. 15. Comparisons <ul><li>Check out this video that gives a great visual on the sizes of the planets and even the size of our sun against other stars! </li></ul><ul><li> </li></ul><ul><li>We’re going to group up and fill out the table on the next slide: </li></ul><ul><li> </li></ul>
  16. 16. Planet Diameter Distance from sun 130 lbs. weighs… Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune “ Pluto”