Rocks
October 9, 2014
Rock
• a mixture of minerals, rock
fragments, volcanic glass,
organic matter, and other
natural materials
Sediment
• Loose material: like tiny
pieces of rocks, mineral
grains from rocks, bits of
shell and remains of living
things that are moved by
wind, water, ice, or gravity.
Rock Cycle
• The process that
creates and changes
rocks
• Shows how rocks can
change from one type
to another
Compaction
• The process where
layers of sediments are
pressed together to
form rock
Cementation
• The process where
sediments are held together
by dissolved minerals
produced when water
moves through rock
Weathering
• The process where air,
water, or ice breaks
down rocks into smaller
and smaller pieces
Erosion
• The movement of
weathered material
(Sediments)
Magma
• Melted rock under
Earth’s surface
Exit Pass
1. Choose three words and use them in a
sentence.
Types of Rocks
• IGNEOUS ROCKS
• SEDIMENTARY ROCKS
• METAMORPHIC ROCKS
Igneous
Rocks:
• A rock formed from
cooled and hardened
magma or lava.
Sedimentary Rocks:
• A rock formed when
sediments are pressed
and cemented
together, or when
minerals form from
solutions
Metamorphic Rocks:
• A rock that has been
changed because of
changes in
temperature and
pressure, or the
presence of hot,
watery fluids