GREAT NECK - A teenager from Great Neck placed second in the Intel Science Talent Search today.

Michelle Hackman, 17, won a prize of $75,000 for her study on the effect of separating teenagers from their cell phones.

The program honors high school seniors who show exceptional promise in math and science.

Evan O'Dorney, 17, of Danville, Calif., won the top award of $100,000 for his mathematical project in which he compared two ways to estimate the square root of an integer.

In total, the Intel Foundation awarded $1.25 million for the Intel Science Talent Search 2011.