The smallest particle of any type of matter would be an Atom
A lake that freeze over is helpful to the organisms inside the water because, the solid ice serves as a barrier between the water and the cold air above the water. The ice prevents the chilled air surrounding the water body from getting to the organisms inside the water. <span />
The purpose of science is to show us how and where organisms start and or begin to Grow.
Answer:
there are 2500 meters in 2.5 kilometers.