Scientists dug into a cliff in East Africa. They found stone tools in some of the rock layers.
The Figure shows the rock layers and the tools found in them.
Figure

Explain why the tool in Layer E is the oldest tool.
Give the age range of the hand axe in Layer C.
Charcoal from a fire was found next to the blade in Layer A.
Explain how the charcoal could be used to find the age of the blade.
Suggest why scientists cannot use carbon dating on the hand axe itself.
40 exam-style questions on Edexcel GCSE Biology 4.2 Evidence for evolution and classification, covering 4.2.1 Fossil evidence for human evolution, 4.2.2 Stone tool evidence for human evolution, 4.2.3 Pentadactyl limb as evidence, and 4.2.4 Three domains classification. Each one has a worked solution and a mark scheme showing where the marks go.