Fit in the smaller planets (Earth, Mercury, Venus, and Mars) around where you drew the bigger planets.Using the compass, draw circles around the diameters.Start with drawing the relative diameters of Jupiter, Saturn, Uranus and Neptune. Use the ruler to draw a line for the diameter.We can divide the diameter of the Earth into the diameters of all the planets, to get a relative comparison. The Sun, with a diameter of 1,393,000 km, is over a million times bigger than Earth and would be too big to draw on a piece of paper for this activity. Remember that diameter is the length of a straight line going through the middle of a circle. First, we need to compare the diameter of the Earth to that of the other planets.Procedure: Scale Model of Relative Diameters of Planets Drafting compass (the kind you draw circles with).A centimeter is 1/100 of a meter, just like a cent is 1/100 of a dollar). (Note that some of the measurements are in centimeters rather than meters. Have your friends position themselves the following distances from you.Give each of your friends a cut-out planet to hold.Label the circles Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.Because the distance scale model only is concerned about distances between the planets, you can make all the planets the same size. Trace 9 circles using the bowl as a guide.Procedure: Scale Model of Distances from Sun Optional: Camera to make a permanent record of your model.
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