Rocks are naturally occurring solid aggregates that are composed of minerals or mineral combinations. There are three main types of rocks: igneous, sedimentary, and metamorphic. Igneous rocks form from the cooling of magma or lava. Sedimentary rocks form through the deposition and compaction of sediments. Metamorphic rocks form from the alteration of existing rocks through heat, pressure, and chemical changes. Rocks can transform between these types through the natural geological processes in the rock cycle.

2.  A rock is a naturally occurring, solid aggregate of
minerals.
 A parent material of mineral soils.
 Combinations of two or more minerals.
 A natural substance composed of solid crystals of
different minerals that have been fused together
into a solid lump.

3. Igneous Rocks
- made of fire ; solidified from molten rock
Sedimentary Rocks
- deposited and buried at Earth’s surface
Metamorphic Rocks
- transformed from pre-existing rocks under high
pressure and temperature.

4. • (derived from the Latin word
ignis meaning fire)
• is one of the three main rock types,
the others being sedimentary and
metamorphic.
• Igneous rock is formed through the cooling
and solidification of magma or lava.

5. Examples of Igneous rocks
Granite Welded tuffPumice

6. • rock that are formed by the deposition of
material at the Earth's surface
and within bodies of water.
• Sedimentation is the collective
name for processes that cause
mineral and/or organic particles
(detritus) to settle and accumulate
or minerals to precipitate from a solution.

7. Examples of Sedimentary Rocks
Conglomerate Breccia Halite

8. • Rock that was once one form
of rock but has changed to another
by the influence of heat, pressure.
• Examples are marble, which can be
formed from limestone, and slate,
which is formed from shale.

9. Examples of Metamorphic Rocks
Schist Lapis Lazuli Marble

11. Rock Cycle
• refers to the diverse set of natural processes that lead to
the formation and transformation of igneous,
sedimentary, and metamorphic rocks.
• includes erosion and weathering, sediment burial,
seafloor spreading, volcanism, tectonism, sediment
transportation and cementation.

12.  For example, sedimentary rocks can be formed
from fragments of pre-existing igneous,
metamorphic, or sedimentary rocks, or any
combination thereof, or can be formed by organic
or inorganic precipitation of common ions
dissolved in salt or fresh water.
 Igneous rocks can be formed via melting and
extrusion or intrusion of pre-existing
sedimentary, metamorphic, and/or igneous
rocks.

13.  Metamorphic rocks can be formed by
alteration of pre-existing rock types through
hydrothermalism, fault slip, or exposure to
high temperatures and pressures due to deep
burial.