5. Rainwater may become trapped in small
crevices of the parent rock. In winter this
water freezes to ice. The ice expands
producing a lateral pressure,causing the
crevices in the rock to further open up.
6.
7.
8. Continual movement of rain and river
water, in liquid form,causes breaking
down of rock particles into finer particles.
9. A rock has energy in several ways. Assuming it's
sitting still, a rock may have gravitational
potential energy because of gravity pulling on
it. It has energy stored in the chemical bonds in
the molecules of the rock. Also, if the rock has
some charge on it(its a possibility), it could
have electrical potential energy if it was in an
electric field. Then of course there is the rest
energy of the rock. According to
relativity(E=mc^2), the rock has some energy
just by being massive.
10. rocks do have potential energy. Potential
energy is defined as energy stored within a
physical system. It is called potential
because it has the potential to be
converted into other forms of energy, such
as kinetic energy which can do work in the
process.
This means that a rock can have potential
energy as simple as, a rock held at an
elevation. If dropped it's potential energy is
then being converted to kinetic energy.
11. Wind blowing across a rock surface has
an abrassive affect on the rocks.
13. The term used for the vertical section of
soil to show the different layers or
horizons of soil.
14. Darkest in colour
Rich in humus
Very fertile
Soft,porous
Roots of plants are present
Living organisms are present
15. Lighter in colour
Harder and more compact than the A-
horizon
Rich in soluble minerals and iron oxides
Remains of plants and animals are not
found
Roots of tall plants reach
Little organic matter found