The diagram illustrates the change and improvement in the cutting tools that were using during the stone age. The tools shown are from 1. 4 million and 0. 8 million years ago. Overall, the development has occured over a time span of 0. 6 million years and although the length has remained constant at about 5 cm, the tools have become sharper and sleek.
Let us take a look at the front view of the tools. Tool A does not have a very sharp tip and also the thickness is not very varied between the bottom and the top of tool, unlike that of tool B, which has a very sharp, pointed tip, with varied thickness between the bottom and the top.
Considering the side view for both of them, it has evolved to become more flattened and thin, giving the tool a sharper edge on the sides as well. Also, tool A had a thicker bottom, which is not case in its successor whose bottom is also rather sharp.
The back view of the tools has also changed over the period. Like the front view, even here the top and bottom have more varying width. But then, while the bottom was flat and straight for tool A and the front view of tool B, the back view for tool B is more smoothened and rounded in shape. Additionally, it has a relatively sharper tip compared to the inital model.
The diagram illustrates the
change
and improvement in the cutting
tools
that were using during the
stone age
. The
tools
shown are from 1. 4 million and 0. 8 million years ago.
Overall
, the development has
occured
over a time span of 0. 6 million years and although the length has remained constant at about 5 cm, the
tools
have become sharper and sleek.
Let
us take a look at the front
view
of the
tools
.
Tool
A does not have a
very
sharp tip and
also
the thickness is not
very
varied between the bottom and the top of
tool
, unlike that of
tool
B, which has a
very
sharp, pointed tip, with varied thickness between the bottom and the top.
Considering the side
view
for both of them, it has evolved to become more flattened and thin, giving the
tool
a sharper edge on the sides
as well
.
Also
,
tool
A had a thicker bottom, which is not case in its successor whose bottom is
also
rather
sharp.
The back
view
of the
tools
has
also
changed
over the period. Like the front
view
, even here the top and bottom have more varying width.
But
then, while the bottom was flat and straight for
tool
A and the front
view
of
tool
B, the back
view
for
tool
B is more smoothened and rounded in shape.
Additionally
, it has a
relatively
sharper tip compared to the
inital
model.