Ten Santa Clara County young scientists were declared grand prize winners Sunday in the Synopsys Silicon Valley Science and Technology Championship.

The 10 high school students win an all-expenses-paid trip to the Intel International Science and Engineering Fair in Pittsburgh, Penn., May 13 to 18.

The grand prize winners include Athman Adiseshan of The Ramana Academy home school; Ryan Chow of Leland High in San Jose; McKenna Duzac of Oak Grove High in San Jose; Mark Holmstrom of Live Oak High and Theresa McLaughlin of Sobrato High, both in Morgan Hill; Revanth Kosaraju of The Harker School in San Jose; Natalie Ng of Monta Vista High in Cupertino; Shubha Raghvendra of St. Francis in Mountain View; Emily To of Oak Grove High in San Jose; and David Zarrin of Saratoga High.

Projects were in the physical and biological sciences. They ranged from Adiseshan's "Predicting Real World Characteristics from Virtual Behavior" to Zarrin's "The Pistonless, Full Stroke Internal Combustion Engine with only 4 Moving Parts."

In addition, the fair named six high school students as grand prize alternates and six middle school students as special prize winners. All 12 won an expenses-paid trip on April 30 to the California State Science Fair in Los Angeles.

The 10 grand prize winners and an additional 65 winners in various categories also are eligible to enter the state science fair.

The Santa Clara Valley Science and Engineering Fair Association named six outstanding teachers: Chris Spenner of Harker; Amanda Alonzo of Lynbrook High in San Jose; John Allen of Oak Grove; Neha Makhijani of Stratford Middle School in San Jose; Sue Greathouse of Old Orchard School in Campbell; and Aru Hill of A Schmahl Science Workshop in San Jose.

The association also named Youssef Ismail of Schmahl Science as the most promising new teacher.

For a complete list of winners, go to www.science-fair.org.

Contact Sharon Noguchi at 408-271-3775. Follow her at Twitter.com/NoguchiOnK12.