I think so... Pennies are made out of copper with some zinc (?) on the inside. Since copper is a metal I would assume that we have a limited amount of it here on Earth. Although, I highly doubt we are going to run out of it any time soon!
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100 penny makes a dollar. Every penny counts, my friend!
No a Secondary Resource is totally different from a Primary Resource so it can't be the same. Primary Resource-The person who was there on that occasion Secondary Resource-The person who was not there on that occasion but knows a lot about it
In this experiment, the control group would be the penny! The independent variable is the substance/water on the penny, and the dependent is how many drops the penny takes.
You pass a penny.You pass a penny.
how many centimeters is a penny