A science teacher asked her students

A science teacher asked her students “Children, if you could own one mineral, what would it be?”

One boy said, “I would choose gold. It’s worth lots of money and I could buy a Corvette.”

Another boy said, “I would want platinum because it’s worth more than gold and I could buy a Porsche.”

The teacher said, “Johnny, What would you want?”

Johnny said, “I would want silicone.”

“Why would you want silicone?” Asked the teacher.

Well my mom got some, he replied, “and there’s always a Porsche or Corvette sitting in our driveway.”