Acelestial object takes six to seven years to revolve once around the sun. it’s made mostly of ice, some of which vaporizes when it passes near the sun. what is this object?

The object is a comet.

Explanation:

A comet primarily comprises rock, ice, dust, and frozen gases like carbon dioxide, carbon monoxide, ammonia, and methane. It is on certain occasions known as the dirty snowballs, and the present studies done on comets have demonstrated that the ice of comet is enveloped by a crust.  

Comets also comprise various kinds of organic compounds as well as the gases. Comets, when it comes close to the Sun while revolving around it, loses some of the ice from its crust as it gets vaporized due to heat coming from the Sun.  

not sure if this what   you'r looking for would be percent composition

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.