Igneous Rocks Overview
Magma
Structure of the Earth
Extrusive and Intrusive
Who Am I?
100
The difference between magma and lava is
magma is inside the earth and lava is outside the earth
100
Molten rock inside the crust is called
Magma
100
What is the following layer of the earth called?
Mantle
100
Intrusive rocks have ________ crystals and extrusive rocks have __________ crystals.
large and small
100
I have a glassy texture, have low density, and usually appear as black. Who am I?
Who is Obsidian?
200
Igneous rocks are formed by the cooling of these two things
Magma and Lava
200
Because different minerals have different ______________, not all parts of a rock melt at the same time
melting points
200
What is the following layer of the earth called?
Outer core
200
Light colored rocks usually have __________ density.
What is lower?
200
I am low in silica content, dark in colour, and comparatively rich in iron and magnesium. I erupt out of shield volcanoes. The lava I am created from is approximately 1200 degrees C. Who am I?
Basalt
300
Extrusive igneous rocks are formed in this location. Intrusive igneous rocks are formed in this location.
on the Earth's surface and inside the Earth
300
As pressure increases, the melting point of rock increases or decreases?
increases
300
What is the Earth's core made up of?
A) Gold and Rock
B) Salt and Rock
C) Metal and Rock
D) Metal and Salt
Metal and rock
300
If the rock cools SLOWLY, the rock has LARGE crystals it is .....
Intrusive
300
I have neither high nor low density, and am intermediate in colour. I have fine, porous texture. I erupt out of stratovolcanoes. I am made up of nearly half iron and half silica, with only a small amount of magnesium included. Who am I?
Andesite?
400
The size of the crystals in igneous rocks are determined by
the rate of cooling of the magma
400
RANDOM QUESTION:
Which colour is not a sea?
A) Red
B) White
C) Green
D) Black
C) Green
400
How thick is the mantle in kms?
A) 4,500
B) 3,000
C) 2,500
D) 3,500
3000 km
400
If the rock cools QUICKLY, the rock has SMALL crystals it is ......
Extrusive
400
RANDOM QUESTION:
How many legs does a lobster have?
10
500
Igneous intrusions form when....
when magma seeps into to preexisting rocks and cools.
500
The four factors that affect magma formation are
What is temperature, pressure, water content, and mineral composition?
500
Which layer of the earth is primarily composed of solid nickel and iron?
Inner core
500
What difference would you expect in the CRYSTAL SIZE between the two types of igneous rocks. Explain WHY there is a difference in crystal size.
You would expect large crystals in intrusive rocks and small crystals in extrusive rocks. you would expect this as the intrusive rocks are formed at a slower rate and higher temperature.
500
These are two common rocks formed during caldera volcano eruptions. They are paler in colour because they contain a high amount of silica and are light to hold. Why are they so light? The stickiness of the lava traps volcanic gases inside, making the lava almost frothy, and when the lava hardens into rock, the gases leave air pockets inside the rock. Who am I?
Rhyolite and pumice