What determines the length of a geologic time period? fossil record material density meteors and rocks radioactive materials

Explain the popular saying "we are made of stardust. how are we made of stardust? use scientific vocab.

With my drivers ed in the decision-making cycle, to decide means to a. carry out an action that has been decided b. estimate if an identified hazard will affect the driver c. pick a course of action d. pick a scanning routine

The place or system in which goods are traded illegally it is two words