HELP I need someone to cure my boredness!!

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

What are fossils of organisms that existed over a wide area but only for a limited time period called?

Which of the following is an example of how telecommunication devices people do their jobs? a.) a security guard checks the time using a digital watch. b.) a banker does some quick math using a solar calculator. c.) a nurse uses a digital thermometer to take a patient’s temperature. d.) a construction worker reports in to his office using a cell phone.