WorksheetsIgneous rock ch 4 ls2
Total questions: 22
Worksheet time: 2mins
What is igneous rock?
What is the primary process involved in the formation of igneous rocks?
Cooling and solidification of magma or lava.
Compaction and cementation of sediments.
Metamorphism due to heat and pressure.
Erosion and sedimentation.
What is extrusive rock?
Extrusive rock created by the alteration of existing rocks under heat and pressure.
Extrusive rock that forms deep underground from slowly cooled magma.
Why do large crystals form in intrusive rock?
Which type of rock is formed from the solidification of magma or lava?
igneous
sedimentary
metamorphic
bioclastic
What three factors determine the type of igneous that forms?
Where does extrusive rock form?
At what rate does extrusive rock cool?
9. Why don't crystals always form in extrusive rock?
10. What happens to the gas in gas-rich lava as it erupts?
The gas expands and can cause explosive eruptions. It escapes.
11. Which feature of extrusive rock indicates that gases escaped?
Vesicles or holes left in the rock.
Striations or holes left in the rock.
Fossils or holes left in the rock.
Crystals and holes left in the rock.
12. Where does igneous rock form?
At what rate does intrusive rock form?
Diorite is an intrusive igneous rock. What does this tell you about it?
it was formed from lava that erupted onto Earth's surface
it was formed from magma that hardened beneath Earth's surface
it was formed from rapidly cooling lava
Where do intrusive rocks form?
Inside the Earth
In outer space
At the bottom of the ocean
On the Earth's surface
How does the temperature of extrusive rock compare to the temperature of intrusive rock?
extrusive rock cools more slowly
intrusive rock cools more slowly
both cool at the same rate
Basalt is an extrusive igneous rock. What does this tell you about it?
it was formed from lava that erupted onto Earth's surface
it was formed from slowly cooling magma
it was formed from magma that hardened beneath Earth's surface
This rock was found near the mouth of a volcano. What type of rock is this?
Sedimentary
Igneous
Metamorphic
Diorite is an intrusive igneous rock. What does this tell you about it?
it was formed from lava that erupted onto Earth's surface
it was formed from magma that hardened beneath Earth's surface
it was formed from rapidly cooling lava
The size of crystals in Igneous Rocks depends upon
pressure
the presence of air
the presence of water
cooling rate
Which type of crystals form in intrusive rock?
What is pumice?
A type of extrusive igneous rock
A heavy, dense mineral
