Why is it that some
areas never flood?
Aim: How is groundwater movement
affected?
Topic: Water Cycle and Climates
Main Idea: Porosity
1) Does groundwater move?
Yes,
groundwater
moves very
slowly
through the
layers of
rock, more
slowly
through clay.
2) Define porosity?
It is the
percentage
of empty
space in a
rock (how
“holey” it
is).
2) How does porosity affect
groundwater movement?
The higher the porosity, the faster the
movement of the groundwater.
•
3) What factors affecting porosity?
A) shape of
particles
B) the sorting
C) their
arrangement
(packing)
D)particle size
E) cracks
F) cementation
Which picture has the greater porosity? Why?
Which picture has the greater
porosity? Why?
Which picture has the greater
porosity? Why?
Which has the greatest porosity?
If the shape, sorting and packing remain
the same the size of the particles can’t
change the porosity.
What other factors might change
the porosity?
A) Cracks
more cracks= higher porosity
B) Cementation
the cement fills in the pores
and decreases the porosity
Summary:
Answer questions 1-5