FALMOUTH — Jen Merrifield’s fourth-graders at the Plummer Motz School are among 10 finalists in a national contest to be named America’s Greenest School.

Their video promoting ways to save energy and natural resources puts them in the running for a $150,000 hybrid school bus, a $20,000 environmental school-building makeover and other prizes.

The top entries are posted at americasgreenestschool.com, where the public can vote for their favorite entry through April 2. A winner will be announced the week of April 21.

Students across the country were asked to submit an entry explaining how they would make their school a greener, more environmentally friendly place.

Merrifield’s students made a video, “We Invite You,” demonstrating simple things that students and others can do to be more green, from stopping dripping faucets to carpooling or riding the school bus instead of being chauffeured individually by their parents.

Their video was among 550 entries in the contest sponsored by IC Bus, a school-bus manufacturer in Warrenville, Ill., and it’s the only finalist from Maine.

Other prizes include a free concert by The Maine, the official band of America’s Greenest School; a $3,000 scholarship for the winning student and/or classroom; $500 in classroom supplies for the winning sponsor/teacher; and a $100 Visa gift card awarded to one voter each day during the voting period.