The department of transportation (dot) defines hazardous materials (hazmat) as any substance in any form or quantity that poses an unreasonable risk to Health ,Safety, and property when transported.
<h3>What Do Hazardous Materials Mean?</h3>
Hazardous materials (hazmat) are any substances that have the potential to endanger human health, cause property damage, or destroy lives or infrastructure. Many hazardous substances (hazmat) don't taste or smell bad. Some are detectable because they result in physiological responses like watery eyes or nausea. Some hazardous materials appear like oil or foam and are found below the surface of the ground. Placards, labels, or markings on the transporters allow the chemical to be recognized.
<h3>One type of hazardous material is </h3>
1) corrosive hazmat materials.
2) Hazardous Materials That Ignite.
3. Materials That React.
4) Radiation-Producing Substances
5) Toxic hazardous substances.
6) Contaminated Items.
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I believe the answer is: catgut tied to crude metal wires
The catgut is made by the intestines of mammals such as horse or sheep. Ancient Egypt was among the first one to use this method in order to preserve the teeth.
For wealthier citizens, they might use a more expensive metal for the braces. The Etruscans for example use gold as a form of brace in order to prevent tooth collapse.
The Roman legions, which were columns of roughly five-thousand men a
piece, were greatly beneficial to the Romans because they were able to
maneuver more freely around enemy forces, which were usually condensed
into a single unit.
Answer:
Independent group contingency
Explanation:
Independent group contingency are reward systems in which members of a group (children) individually earn token reinforcers demonstrating ideal behavior.
