GEOL 1340 EXAM 1 ONLINE LYTWYN
CHAPTERS 1-3 ACTUAL PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ What components are in extrusive igneous rock? Answer: Basalt,
myeline, andesite, obsidian, pumice, scomia, lava, feldspar, and
gabbro
◉ How are igneous rocks classified? Answer: origin, texture, and
mineral composition (Si=silicone,
O=oxygen,Al=aluminum,Ca=calcium, Na=sodium, K=, Fe=iron, and
Mg=magnesium)
◉ what components are intrusive igneous rock? Answer: magma
and granite
◉ what is texture? what factors control it? Answer: 1) rate @which
magma cools( cool rate)
2) amount of silica present( composition)
3)amount of dissolved gases in magma
◉ what is volcanic glass(obsidian) essentially? Answer: compact
glass
, ◉ Non-foliated rocks Answer: marble=metamorphosed limestone
made of coarse calcite crystals
quartzite=metamorphic rock made from fused quartz grains
◉ what components are in magma? Answer: aluminum oxide, iron,
magnesium, calcium, sodium, potassium, titanium, manganese,
phosphorous, and water
◉ how does temperature affect crystallization? Answer: -silicon and
oxygen bond
-tetrahedra join
-other ions join growing crystal
-as crystal form, magma changes composition
◉ what is lava? Answer: volcanic=extrusive=lava
-groundmass/matrix
-formerly liquid components
◉ oxide group? Answer: o+metallic elements
s+metallic elements=sulfide
-minerals with anion groups(CO3)-2= carbonate group
-minerals with anion groups( Si04)-4=Silicate group
CHAPTERS 1-3 ACTUAL PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ What components are in extrusive igneous rock? Answer: Basalt,
myeline, andesite, obsidian, pumice, scomia, lava, feldspar, and
gabbro
◉ How are igneous rocks classified? Answer: origin, texture, and
mineral composition (Si=silicone,
O=oxygen,Al=aluminum,Ca=calcium, Na=sodium, K=, Fe=iron, and
Mg=magnesium)
◉ what components are intrusive igneous rock? Answer: magma
and granite
◉ what is texture? what factors control it? Answer: 1) rate @which
magma cools( cool rate)
2) amount of silica present( composition)
3)amount of dissolved gases in magma
◉ what is volcanic glass(obsidian) essentially? Answer: compact
glass
, ◉ Non-foliated rocks Answer: marble=metamorphosed limestone
made of coarse calcite crystals
quartzite=metamorphic rock made from fused quartz grains
◉ what components are in magma? Answer: aluminum oxide, iron,
magnesium, calcium, sodium, potassium, titanium, manganese,
phosphorous, and water
◉ how does temperature affect crystallization? Answer: -silicon and
oxygen bond
-tetrahedra join
-other ions join growing crystal
-as crystal form, magma changes composition
◉ what is lava? Answer: volcanic=extrusive=lava
-groundmass/matrix
-formerly liquid components
◉ oxide group? Answer: o+metallic elements
s+metallic elements=sulfide
-minerals with anion groups(CO3)-2= carbonate group
-minerals with anion groups( Si04)-4=Silicate group
