Rocks & Pressure Flashcards
What are rocks made out of?
Grains
Rocks can be different what and shapes?
Sizes
Grains give rocks what?
Texture
As magma traps in small pockets it…
Cool and magma becomes an igneous rock
How are igneous rocks formed?
When volcanoes erupt causing the magma to rise above the earths surface and are formed from the lava cooling above the ground
If the rock has small crystals it cools down..
Quickly
If the rock has large crystals its cooled down ..
Slowly
Force = ? x Area
Pressure
Pressure = area divided by ?
Force
Area = what divided by pressure?
force
Sedmentary rocks are what?
Porous
Sedimentary rocks are harder or softer than igenous rocks?
Softer
All rocks are made up of different what?
Minerals
How are metamorphic rocks formed?
when other rocks are deeply squashed or heated under great pressure
All of what type of rocks were originally other types of rock
Metamorphic
As more layers of rocks build up, the older rocks get pushed were into the earth?
Down
Earth what can squeeze the rocks?
Movements
Earth movements can squeeze the rocks and raise their what?
Temperature
Over a long period of time the rocks can get changed into what type of rock?
Sedimentary
Limestone changes into what rock when its heated and squashed
Marble
Is Marble a metamorphic rock?
Yes
Temperature cause what type of weathering?
Physical
The rock what during the day when its hot in physical weathering
Expands
What does the rock do when its cold at night in physical weathering
Contract
What action can cause physical weathering
Freez-Thaw
Rain can cause what type of weathering
Chemical
The what in the rain dissolves parts of rock?
Acid
Acid rain can be caused by burning what
Fossil Fuels
Plant roots can acuse what type of weathering
Biological
The plant roots grow into small what in the rocks
Cracks
