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.
The Stone Age is divided by archaeologists (people who study relics) into three sections: Paleolithic (old stone), Mesolithic (middle stone) and Neolithic (new stone). Pottery was invented during the Neolithic Stone Age. Some people also believe the art of writing began in the Neolithic Stone Age.ome groups of people were still in the stone age into the 20th century. They also killed animals for food and clothing. The time after the Stone Age is the Bronze Age, named after the metal bronze. The Stone Age ended when people discovered the art of smelting (making metals).