EARTH SCI 2ND QUARTER Flashcards
WEATHERING, INTERNAL HEAT, MAGMATISM
is the process of breaking down
rocks present at Earthβs surface
WEATHERING
Weathering can happen in the presence of the
ACTION OF RAINWATER
VARIABLE EXTREME TEMPERATURE
DIFFERENT BIOLOGICAL ACTIVITIES
3 TYPES OF WEATHERING
PHYSICAL
CHEMICAL
BIOLOGICAL
5 AGENTS OF WEATHERING
- WATER
- SALT
- TEMPERATURE
- PLANTS
- ANIMALS
One of the agents of mechanical
weathering. In liquid form, it seeped into cracks and crevices of rocks and when the temperature dropped, it freezes and definitely will expand in the form of ice.
WATER
Haloclasty is a type of weathering where salts act as the agent.
Saltwater enters cracks and pores of rocks, and when the water evaporates, salt crystals form
SALT
Thermal stress causes weathering
as rocks expand with heat and
contract with cold. Over time,
repeated temperature changes
weaken the rock, leading it to
crumble.
TEMPERATURE
The roots grow causing
penetration into the crack,
expand, and in the long run,
break the rock.
PLANTS
rats, rabbits and squirrels
excavate into the ground to create a space for habitation.
ANIMALS
is a process wherein rocks are
broken down into smaller
pieces without changing
their chemical composition
due to several factors like
fluctuating temperatures
and pressure, and biological
activity.
MECHANICAL OR PHYSICAL WEATHERING
is a process that involves repeated cycles of freezing and thawing of
ice. It happens when there is
sufficient moisture; preexisting cracks; and when temperatures frequently rise and fall
FROST WEDGING
is a type of physical weathering that
involves the peeling or flaking away of the outer layers of rock. This process typically occurs due to changes in temperature and
pressure.
EXFOLIATION
is a type of physical weathering
that occurs when rocks and
particles wear away surfaces
through friction and impact.
ABRASION
is a process wherein rock materials are changed into other
substances that have
different physical and
chemical compositions.
