Friday, January 30, 2015
The Earth’s Crust
Rock Families
Igneous Rock
Rock Families
#1 Igneous
There are three rock families:
#2 Sedimentary
#3 Metamorphic
1. Igneous Rock
Igneous Rock -
“Born of Fire”
Igneous rock
forms from
melted rock
(lava or magma)
when it cools.
Lava – melted rock that is found
outside (“on”) the Earth’s crust
Magma – melted rock that is
found inside the Earth’s crust
Magma – melted rock that is
found inside the Earth’s crust
Lava – melted rock that is found
outside (“on”) the Earth’s cru...
When lava and
magma cool, they
form two different
kinds of Igneous
rock:
1. Intrusive rock –
igneous rock that
is formed f...
2. Extrusive rock
– igneous rock
that is formed
from cooled lava
(e.g. pumice)
The main
difference
between intrusive
and extrusive
rock is their
crystal size,
which depends on
how quickly they
cool.
Intrusive rock (from magma)
cools very slowly inside the Earth’s crust
and forms large crystals.
Extrusive rock (from lava...
Examples of
Igneous Rock:
Granite
Pumice
Obsidian
Basalt
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Igneous rock

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This was created to meet the curriculum outcomes in New Brunswick's Grade 7 Science Earth's Crust Unit.

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Igneous rock

  1. 1. Friday, January 30, 2015 The Earth’s Crust Rock Families Igneous Rock
  2. 2. Rock Families #1 Igneous There are three rock families: #2 Sedimentary #3 Metamorphic
  3. 3. 1. Igneous Rock Igneous Rock - “Born of Fire” Igneous rock forms from melted rock (lava or magma) when it cools.
  4. 4. Lava – melted rock that is found outside (“on”) the Earth’s crust
  5. 5. Magma – melted rock that is found inside the Earth’s crust
  6. 6. Magma – melted rock that is found inside the Earth’s crust Lava – melted rock that is found outside (“on”) the Earth’s crust Lava sampling
  7. 7. When lava and magma cool, they form two different kinds of Igneous rock: 1. Intrusive rock – igneous rock that is formed from cooled magma (e.g. granite)
  8. 8. 2. Extrusive rock – igneous rock that is formed from cooled lava (e.g. pumice)
  9. 9. The main difference between intrusive and extrusive rock is their crystal size, which depends on how quickly they cool.
  10. 10. Intrusive rock (from magma) cools very slowly inside the Earth’s crust and forms large crystals. Extrusive rock (from lava) cools quickly and forms small crystals.. Igneous rock video
  11. 11. Examples of Igneous Rock: Granite Pumice Obsidian Basalt

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