Answer :
Final answer:
Sharp edges on tools are known as blades, a term often used to describe the cutting edge of a tool or weapon, like a knife or sword, that is designed for effective slicing or cutting.
Explanation:
Many tools have sharp edges that are also known as blades. The term blade is commonly used to describe the cutting part of a tool or weapon, which is sharp and designed for slicing or cutting. It can refer to the sharpened edge of a knife, which due to its smaller surface area, exerts higher pressure and can cut more effectively. This is because pressure is the force per unit area, and a sharp blade delivers the force over a smaller area, resulting in greater pressure. In history, blades have been essential components of tools and weapons, such as Acheulean hand-axes and swords, which feature a pointed blade that might be straight or curved with one or both edges sharpened. Furthermore, in human evolution, the shift from round flakes to the manufacture of blade tools marked an advancement in tool-making, known as the blade tool industry. This demonstrated the efficiency of long, thin, and flat blades with sharp edges over older technologies.
