Ceremonies will be held across Massachusetts Tuesday to honor those lost 11 years ago in the Sept. 11, 2001, terrorist attacks and service members who have died in the wars waged since.

In Boston, observances will ­begin at 7:30 a.m.

A wreath-laying will be held in Boston Public Garden, officiated by Mayor Thomas M. Menino. At 8:30 a.m., the flag will be lowered, a ­moment of silence will be observed, and the names of Massachusetts Sept. 11 victims will be read on the front steps of the State House.

Attendees are expected to ­include Governor Deval Patrick, Lieutenant Governor Timothy Murray, and US Senator Scott Brown.

Many cities and towns across the state will participate in a ­moment of silence or ringing of church bells at 8:46 a.m. and 9:03 a.m., the times each of the two planes that departed from Boston flew into the World Trade Center towers.

At Logan International Airport, the Transportation Security ­Administration plans to halt security screenings to hold two moments of silence, one just after the first crash at 8:47 a.m. and another at 1 p.m.

At 9:30 a.m. at the State House, officials will present the annual Sweeney Award for ­Civilian Bravery, named for ­Acton resident Madeline Amy Sweeney, a flight attendant on one of the hijacked planes.

At 11 a.m., Massachusetts Fallen Heroes, a memorial fund founded by local members of the military, will present a video memorial honoring fallen Massachusetts soldiers along the Mother’s Walk on the Rose Fitzgerald Kennedy Greenway.

Volunteers and supporters of the Massachusetts Military Heroes Fund will also be working on a service project to send 1,000 care packages to state military personnel stationed around the world.

Menino, Patrick, and Attorney General Martha Coakley will all attend around 1 p.m.

The service project will take place on the Greenway near the end of Milk Street until 2 p.m. and is open to anyone who would like to help fill packages or write notes of support.

Massachusetts Fallen ­Heroes at 4:30 p.m. will light the top of the Prudential Tower in red, white, and blue to honor the 44,000 Massachusetts men and women who have served in the wars in Iraq and Afghanistan, and the 162 who have lost their lives. Later, uniformed firefighters, a band, and honor guard will parade from Boston Common to Beacon Street for the annual Massachusetts Fallen Firefighter Memorial Ceremony at 6 p.m. behind the State House in Ashburton Park.

Outside Boston, some of the hometowns of those who perished in the attacks will also hold events.

Framingham plans to host a remembrance ceremony at Cushing Memorial Park at 5:30 p.m. in honor of 17 people.

The Plymouth Fire Department will hold a small observance at the town’s Sept. 11 monument on South Spooner Street at 9:45 a.m.

And the town of Wrentham will unveil its Sept. 11 memorial at 6:30 p.m. in a ceremony on the lawn of Wrentham Town Hall.

The memorial was the Eagle Scout project of Wrentham teenager Troy Neubecker, who raised over $20,000 for the monument.