2. Fire or hot rocks, form when melted rock (magma or
lava) cools. When magma cools slowly, large minerals
are produced. In lava that cools quickly the minerals
can only be seen with a microscope.
IGN = Latin for fire
ignite, ignescent, ignis fatuus, ignition,
ignitron, igniter
IGNEOUS Rocks
3. Sedimentary rocks are usually formed under
water when grains of broken rocks are glued
together.
SEDIMENT = Latin meaning to settle
sedimentology, sedimentation
SEDIMENTARY Rocks
4. Metamorphic rocks are rocks that once were igneous or
sedimentary rocks but have been changed by pressure
and temperature.
META = from Latin and Greek meaning to transform;
MORPH = Greek meaning form
Metamorphism, metamorphose
METAMORPHIC Rocks
5. IGNEOUS - fire or hot
SEDIMENTARY - cool, wet, fossil
METAMORPHIC - flat, squished,
changed
Nicknames for the rocks
