Space junk or regular junk? How to tell

The FAA has updated its forecast, pinpointing the likely landing area of incoming satellite debris as "somewhere on Earth." This increases the chance that when you get up tomorrow morning, there will be a smoking chunk of meteor among the discards that already litter your yard.

How can you tell the difference between this new space junk and your old regular junk? Here's a guide.

Temperature 
Meteorite: hot to the touch; will burn through oven mitt
Discarded lawn mower: same as outdoor air temperature

Specific gravity 
School-bus-sized meteor: 7 to 8 grams per cubic centimeter
Broken-down school bus: up to 2 gm/cm(3), depending on seating capacity

Value on eBay
Meteorite: Over $1 million (minus shipping cost of approximately $10 million)
Old tires: zero

Curiosity value to neighbors
Meteorite: high. Put up a fence and charge admission.
Lawn junk: nil

Potential for reuse
Meteorite: low
Lawn junk: extremely high; that's why you've been saving it, right?