Help for solar system project

[Tammy]

DD’s 5th grade project is solar system model. Have directions from her teacher and told to “change mm to cm.” Maybe I’m over thinking this or I’m just tired, but I see this one of two ways and both don’t work based on smallest planet size or largest.
Here’s the part I need help on. I’m going to reference the model diameters in her textbook for just Pluto 2mm and Jupiter 143mm.
A: if convert mm to cm, then Pluto is 0.2cm and Jupiter to 14.3cm. Except a model size at 0.2cm isn’t going to happen realistically. Too small!
B: if stay with same numbers but change mm to cm, then Pluto is 2cm and Jupiter is 143cm. Too big for model Jupiter!

What am I missing here???? I’ve googled and searched...no luck. If you made it this far and understand, thanks!




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[ellies mom]

DD’s 5th grade project is solar system model. Have directions from her teacher and told to “change mm to cm.” Maybe I’m over thinking this or I’m just tired, but I see this one of two ways and both don’t work based on smallest planet size or largest.
Here’s the part I need help on. I’m going to reference the model diameters in her textbook for just Pluto 2mm and Jupiter 143mm.
A: if convert mm to cm, then Pluto is 0.2cm and Jupiter to 14.3cm. Except a model size at 0.2cm isn’t going to happen realistically. Too small!
B: if stay with same numbers but change mm to cm, then Pluto is 2cm and Jupiter is 143cm. Too big for model Jupiter!

What am I missing here???? I’ve googled and searched...no luck. If you made it this far and understand, thanks!




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I would go with a 0.2 cm Pluto. It won’t be a bad as you think. You could find a bead and glue the tip of a wire into the hole or even make a small ball out of clay and stick a wire into it. It will set up a better scale for the rest of the planets than a 143cm Jupiter.


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[niccig]

It’s A. Find a small bead with diameter close to 2mm. I thought I teacher said to convert to cm as it’s easier to measure 14.3cm then 143mm. And in my experience metric conversions confuse many people as not familiar with metric.


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[sariana]

C! Pluto is no longer a planet and doesn't need to be included. :-)

(Or go with A.)

[Tammy]

Thanks for replies!!! We have the various sizes of styrofoam balls so will shave down smaller.
Sariana- I know I asked her about Pluto! It’s still in her book with model measurements and they have to include for this project. Thanks!


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[KrisM]

C! Pluto is no longer a planet and doesn't need to be included. :-)

(Or go with A.)


That's what I was going to say :)

[vonfirmath]

C! Pluto is no longer a planet and doesn't need to be included. :-)

(Or go with A.)

Yeah. I'm just as happy to model a solar system with Pluto. I cannot reconcile myself to a solar system without Pluto.

[bisous]

Yeah. I'm just as happy to model a solar system with Pluto. I cannot reconcile myself to a solar system without Pluto.

I forget sometimes too! But it has been demoted from planet status for 12 years so sorta surprising that the school requires it!