Because it is harder/more compressed or A is softer/less compact
very difficult
difficult
d)
A - Fossilised shells in sandstone
and
B - Limestone
difficult
difficult
e)
Dense forest on low lying land
Dinosaurs roaming the land
Change in sea level resulting in deep sea
Sea becoming shallow
very difficult
very difficult
Diagnostic and formative information:
Common error
a) i)
Where a wrong layer was chosen, 89% chose layer B – Limestone.
ii)
Layer A chosen by 31% of students.
Layer C chosen by 26% of students.
Analysis of responses
d)
A breakdown of the layers chosen to be formed under the sea.
Layer A – selected in 38% of answers.
Layer B – selected in 23.5% of answers.
Layer C – selected in 23.5% of answers.
Layer D – selected in 15% of answers.