In-facepiece dust concentration is changed dozens of times in a matter of minutes due to changes of the size of the gaps between the mask and face. Source. A respirator is a device designed to protect the wearer from inhaling particulate matter, including airborne microrganisms, fumes, vapors, i.e. gases.
Why join Brainly? A community for students. Products of the neolithic culture Steel plows Boats with sails Domesticated dogs Wild figs. the answer would mostly likely be referring to things that actually were of use to the neolithic people and agriculture was the biggest thing making the answer steel plow. anonymous.
One of the main differences between the Palaeolithic and Neolithic periods was in the main methods people used to acquire food. In the Palaeolithic, anatomically modern humans and their ancestors were mainly nomadic hunter gatherers.he Paleolithic people had domesticated fire about 500,000 years ago. They created mythic religious ideas to explain birth, sickness, death, the sun, the moon, rain, wind, thunder and lightening. The Neolithic Age was also known as the New Stone Age.