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.
Toward the end of the Neolithic Era, people began to use tools made from metal. Copper was the first metal used for tools. Eventually copper replaced stone, leading to the Copper Age.We will talk in class about an amazing early Copper Age discovery in the mountains near the Italian and Austrian border.ather than the small family groups of the Old Stone Age, we have evidence that the people of the New Stone Age settled in large city complexes. Catal Hoyuk, Turkish for fork mound, in the modern country of Turkey is an outstanding example of a Neolithic city.