The volume calculation exercise can be cut out and done by the students, too.

In order to fully enjoy this adventure you should learn a few things about the King of Planets. For one, it's

Is the sum of their volumes less than that of Jupiter?

A pretty accurate way to do this is by using scientific notation and rounding to 2 significant digits.
For example, Jupiter's diameter can be rounded to 1.4 X 10^{5} km. Half of that is 0.7 X 10^{5} km,
Jupiter's radius. You can calculate R^{3} by multiplying 0.7 X 0.7 X 0.7 (= 0.34) and multiplying
the exponent by 3 (5 X 3 =15).... R^{3} = 0.34 X 10^{15} km^{3} . The term (4/3 pi) can be simplified to 4
since pi is about 3 (4/3 X 3 = 4). Jupiter's estimated volume is 1.4 X 10 15 km^{3} (4 X 0.34 X 10^{15} ).
Without the short-cuts the answer you get is 1.5247 X 10 15 km^{3}.

A fun way to teach about shapes and volumes is to use modeling clay. Make a sphere for each planet at a manageable size (for example 1 mm per 1000 km of diameter). First compare the volumes as spheres. Would they fit inside Jupiter "as is"? Then "mash" the non-Jupiter spheres together into a ball and compare with Jupiter.

Using this technique the Jupiter sphere will be 14.3 cm in diameter, and the Pluto sphere will be 2.3 mm in diameter.

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