Just the planets 4.docx

The Planets Name ___Bernisha____________________________________ Planet AU from the Sun Period of revolution Period of rotation Diameter (mi) Mass relative to Earth Density Number of moons Mercury 0.4 88 D 59 D 3015.06 0.056 5.4 0 Venus 0.7 224.7 D 244 D* 7526.18 0.82 5.2 0 Earth 1 365.25 D 1 D 7919.88 1 5.5 1 Mars 1.5 687 D 1.02 D 4216 0.108 3.9 2 Jupiter 5 11.86 Y 0.4097 D 88700.3 317.87 1.3 79 Saturn 10 29.46 Y 0.426 D 75000.16 95.14 0.7 82 Uranus 20 84 Y 0.718 D 28999.88 15.56 1.2 27 Neptune 30 165 Y 0.669 D 28900.06 17.21 1.7 14 D is Earth days Y is Earth years *Retrograde – Venus is spinning clockwise not counterclockwise. Density is mass per unit of volume water has a density of exactly 1, ie one gram per cubic centimeter. Look at the densities of the Jovian versus the terrestrial planets. 1) What is the average density of the Jovian planets?  Density 3.626 2) What is the average density of the terrestrial planets?  Density 17.075 3) Why are they so different? Jovian plants outer gas in the solar system Terrestrial planets inner , made of rocks Remember that period of rotation is how long it takes a planet to spin. It can also be thought of as how long a day is. The unit “D” for period of rotation is Earth Days. 4) How long is a day on Mercury?  59 days 5) How long is a day on Neptune?

 66 days 6) Does distance from the Sun have anything to do with the period of rotation? No connection between the two. 7) Do Jovian planets have longer or shorter days than terrestrial planets?  Yes, there longer than terrestrial planets 8) So, are they spinning faster or slower than terrestrial planets?  Jovian spin much faster than Terrestrial Revolution is how long it takes a planet to go around the sun. This is a year on that planet. 9) How long is a year on Mercury?  88 days 10)How long is a year on Neptune?  165 earth days 11)Is the period of revolution related to distance from the sun? If so How?  The squares of the period are proportional to the cubes. The more distance the planet the longer it takes to revolution. Remember that Kepler’s third law relates how far a planet is from the sun to its orbital period. P 2 =D 3 where P is the period and D is the distance to the sun in AUs. So if a planet is 2 AUs from the sun; P 2 = D 3 P 2 = 2 3 P 2 = 8 P = √ 8 P= 2.8 Earth Years So it takes the planet 2.8 Earth years to go around the Sun 12)What is the orbital period of a planet that sits 3 AUs from the sun? 3x3x3x3= 27

13) What is the orbital period of a planet that sits 7 AUs from the sun? 7x7x7x7x7x7x7= 823543=907.49 We can use the period of rotation and revolution to figure out how many of a planets days there are in a planets year. To do this divide the period of revolution by the period of rotation. Days ∈ a planet' s year = Revolution Rotation If a planet has a period of revolution of 455 Earth days and a period of rotation of 5 Earth days how many of this planet’s days are there in one of this planet’s years? 455 Days 5 Days = 91 So on that planet there are 91 days in a year. It’s important to keep in mind that you need to be dividing days by days if you’re given the period of revolution in years, you’ll need to multiply by 365.25. If a planet has a period of revolution of 50 Earth Years and a period of rotation of 3 Earth days how many of this planets’ days are there in a year? 50 × 365.25 3 18,262.25 3 = 6087.5 So on that planet there are 6,087.5 days in a year 14) How many days are there in a year on Mercury (look at the chart for the numbers you need) 15) How many days are there in a year on Mars? 1.5

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

16) How many days are there in a year on Saturn? 3586.8 17)Why wouldn’t this work on Venus? Because Venus is counterclockwise