Cutting tools in the Stone Age
The diagram below shows the development of cutting tools in the Stone Age. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.
There are many changes
The biggest changes: sharper and more pointed.
The given diagrams depict the development of a Stone Age cutting tool between 1.4 million years ago and 0.8 million years ago.
In general, over the given time frame, the Stone Age cutting tool has been refined from a simple fragmented piece of rock to a sharper, more sophisticated one.
The cutting tool from 1.4 million years ago was a jagged piece of rock with no identifiable shape. Its front and back side were somewhat asymmetric, and looking at the rear view, we can see that the tool was thick, and its edge was quite blunt. The overall length of the tool was about 7-8 centimeters.
Further refinement was made to the 0.8-million-year-old stone cutting tool. The tool was 2-3 centimeters longer, and it was shaped to more or less resemble a primitive, teardrop-shaped knife that was quite rough in the front and rather smooth in the back. The tip of the tool was pointed, and its edge appeared to be relatively sharp compared to its earlier, 1.4-million-year-old version.